Semantic Coherence: Mailchimp Transactional – Signal Evidence & AI Readability

Join our first Mailchimp Transactional event on June 4 at NYC Tech Week — save your spot

TRANSACTIONAL EMAILS & SMS
[H1] Transactional messaging built to scale with your business

Mailchimp can send up to 157 billion emails per month—it’s infrastructure you can count on no matter what your needs.

Sign up today

Talk to Sales

View documentation

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[H2]
Stay on-brand

Build emails from scratch or seamlessly import your Mailchimp templates.

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[H2]
Manage inbound email

Respond to emails with an action, like sending an RSVP or updating a to-do list.

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[H2]
Send from anywhere

Send from multiple domains or subdomains, all from one account

[H2] Transactional email by the numbers
Mailchimp transactional email & SMS is a dependable solution for businesses of all sizes—and we have the facts to back it up.

[H3] Average email delivery rate: 99%
Send urgent transactional emails with confidence.

[H3] Max email sends per month: Up to 157 billion
With the infrastructure to send up to 157 billion emails per month, we're a scalable platform that can handle any volume your business demands from startup to enterprise.

[H3] Reported transactional email uptime: 99.99%
Uptime past performance is not a guarantee of future performance and may be affected by factors outside of our control. View server status.

[H3] Median delivery speed: Less than 1 second
With a median delivery speed of less than one second, your critical transactional emails get to the inbox the moment they're needed.

[H3] Median bounce rate: 2.69%
Since 2018, Mailchimp Transactional has delivered over 300 billion emails while maintaining a median bounce rate of 2.69%

[H2] Fast, dependable transactional SMS messages
With Mailchimp’s updated transactional API, businesses can send critical 1:1 text messages via SMS as well as email.
Learn about transactional SMS

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[H2]
Get started today

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

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[H2]
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263
21

/mo for 12 months

per month for 12 months

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/month†
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04

/mo for 12 months

per month for 12 months

Then, starts at
/month†
per month†

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Enhanced marketing automation flows

Personalized Onboarding

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9
78

/mo for 12 months

per month for 12 months

Then, starts at
/month†
per month†

24/7 Email & Chat Support

Popup Forms

A/B Testing

Basic marketing automation flows
Personalized Onboarding
Predictive Segmentation
Behavioral Targeting

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Easily create email campaigns and learn more about your customers.

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Limit of 250 contacts

£
0

/month†
per month†

Email support for first 30 days

Popup Forms
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Basic marketing automation flows
Onboarding
Predictive Segmentation
Behavioral Targeting

Sign Up Free
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Contact limit exceeded
Limit

†See Free Trial Terms and Offer Terms. Send up to 100 emails without payment info.
Overages
apply if contact or email send limit is exceeded. Free plan sending will be paused if contact or email send limit is exceeded. Learn more.

See all plan details

[H2] Customize your settings from start to send

[H3] Stay on-brand
Build emails from scratch or seamlessly import your Mailchimp templates.

[H3] Manage inbound email
Respond to emails with an action, like sending an RSVP or updating a to-do list.

[H3] Send from anywhere
Send from multiple domains or subdomains, all from one account.

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[H3] Get world class support
Get in touch with our award-winning Support team for troubleshooting.
Learn more

[H3] Learn more about Mailchimp transactional APIs and get started.

Transactional Email Pricing

API Documentation

[H2]
FAQs

[H3]

What’s the difference between Mandrill and Mailchimp Transactional?

Mandrill was the original name for Mailchimp's transactional email service. It was rebranded in fall 2025 to Mailchimp Transactional to better reflect how it fits within the broader Mailchimp platform.
The product still offers the same reliable transactional email infrastructure but now also includes transactional SMS, giving you more ways to reach customers with time-sensitive messages like order confirmations, shipping updates, and password resets.

[H3]

Why did we rebrand Mandrill to Mailchimp Transactional?

The rebrand brings transactional messaging under the same roof as your marketing tools. With Mailchimp Transactional, your marketing and transactional emails live in one unified platform, so you can manage everything from a single place.
Marketers can also make edits to transactional email templates directly within Mailchimp without needing to loop in a developer, which speeds up workflows and gives your team more control over the customer experience.

[H3]

What is transactional SMS?

Transaction SMS refers to automated text messages sent to subscribers based on actions they take or events related to their accounts. These messages include:
Order confirmations
Shipping notifications
Appointment reminders
Password resets
Account alerts
Unlike promotional messages, transactional SMS provides information that customers need or requested through their interaction with your business.

[H3]

What are the benefits of using transactional SMS?

Transactional SMS offers several advantages for businesses and customers, including:
Immediate delivery: Messages arrive within seconds, making them ideal for time-sensitive information like delivery updates or verification codes.
High open rates: Most people read text messages within minutes of receiving them, so your important updates actually get seen.
Better customer experience: Customers appreciate getting relevant information when they need it, like confirmation that their order went through or a reminder about an upcoming appointment.
Increased trust: Sending timely updates shows customers you’re on top of things and keeping them informed.
This impact varies by industry. For example:
Healthcare providers can reduce no-shows by sending appointment reminders the day before scheduled visits.
E-commerce businesses see fewer customer service inquiries when they send real-time shipping and delivery notifications.
Financial services companies can improve security and reduce fraud by sending two-factor authentication codes for account access.

[H3]

How can I use transactional SMS?

You can set up transactional SMS to send automatically when certain triggers occur. Common uses include:
Sending order confirmations when someone makes a purchase
Delivery notifications when items ship
Appointment reminder the day before scheduled services
Two-factor authentication codes for account security
The messages go out automatically based on customer actions, so you don’t have to send each one manually.
With Mailchimp, transactional SMS is set up through the Transactional API. Messages are triggered automatically based on customer actions in your system, like completing a purchase or requesting a password reset.
You can also use webhooks to track message events in real time, including when messages are sent, delivered, clicked, or if recipients unsubscribe. With this information, you have complete visibility into how your messages are performing.

[H3]

Does Mailchimp have transactional SMS?

Yes, Mailchimp offers transactional SMS capabilities. You can set up automated text messaging to send communications based on customer behavior and actions.
The feature integrates with your existing workflows, so you can manage both your marketing messages and transactional notifications from one platform.
There are a few requirements to get started. Your Mailchimp account needs to be on a Essentials plan or higher, and you’ll need to set up a text messaging credit plan with an approved sending number. Once your account is ready, you can apply for SMS access and buy credits directly in Mailchimp.

[H3]

Does Mailchimp transactional email have reliable deliverability?

Yes. Mailchimp Transactional email delivers 99% of emails successfully, operates with 99.99% uptime, and gets messages to the inbox in under one second. The infrastructure supports up to 157 billion emails per month, so it scales whether you're a growing business or an enterprise operation.
That level of reliability matters for both marketers and developers. Marketers need confidence that receipts, shipping notifications, and account updates are actually reaching customers — because a missed transactional email can erode trust fast.
Developers need an infrastructure they can count on without constant monitoring, especially when sending at high volumes or integrating transactional messaging across multiple systems.

[H3]

Do customers need to opt in to receive transactional SMS?

Yes, customers need to opt in before you can send them transactional SMS. This means they must give you explicit permission to contact them via text message, even for non-promotional messages like order confirmations or shipping updates.
It’s important to note that email consent is different from SMS consent. Even if a customer has opted in to receive emails from you, you need to obtain separate SMS consent before sending them text messages. This is required by Mailchimp’s Standard Terms of Use and applicable laws.
Getting proper opt-in is essential for several reasons:
Legal compliance: SMS messaging regulations like the Telephone Consumer Protection Act (TCPA) in the United States and similar laws in other countries require that businesses get permission before texting customers. Without proper consent, you risk facing substantial penalties and potential lawsuits.
Customer privacy and trust: Requiring opt-in respects your customers’ preferences and privacy. Not everyone wants to receive text messages, even for important updates, so giving them control over how you contact them builds trust.
Better engagement: Customers who actively opt in are more likely to engage with your messages since they’ve chosen to receive them.

[H3]

What’s the difference between promotional SMS and transactional SMS?

The key difference between promotional and transactional SMS comes down to purpose and content.
Promotional SMS refers to marketing messages designed to promote products, services, sales, or special offers. They’re used to drive engagement and sales.
Transactional SMS refers to messages that provide information related to a specific transaction or account activity that the customer initiated. They’re informational rather than promotional, like order confirmations or shipping updates.
For example, a text about a 20% off sale is promotional, while a text confirming that an order shipped is transactional.

[H3]

What is a Mailchimp transactional email?

Mailchimp transactional email is a delivery API, or application programming interface, that can deliver transactional emails to customers without you overseeing the process.
Transactional emails, also known as “triggered emails,” are one-to-one messages sent when a specific action occurs or a request is made from the contact.
For example, a customer may receive a transactional email with their order information after a purchase is complete. Other examples of transactional emails include account updates, password reminders, and notifications or alerts.
Compared to bulk marketing messages, transactional emails are only sent to one individual at a time rather than a group of people.
Typically, these emails are time-sensitive and require you to deliver messages quickly. With our transactional email service, you can automatically send messages to the recipient’s email server.
When you send a transactional email with Mailchimp, you can ensure customers receive the i

50% Off 1M+ Emails for 12 months**. Contact Sales today.

[H1] Flexible plans built for 99% email delivery
What is Transactional Email?
Have questions? Contact Sales

[H2] Flexible plans built for 99% email delivery
What is Transactional Email?
Have questions? Contact Sales

Enter your estimated sends per month

Add dedicated IP for $29.95 / month (Optional)

Your Plan

Try for free*

[H3] Each block is a credit for 25,000 emails

Each block is a credit for 25,000 emails

Total Blocks
Emails per Month
Price Per Block

1 to 20 blocks
1 to 500k emails
$20/block

21 to 40 blocks
500k to 1M emails
$18/block

41 to 80 blocks
1M to 2M emails
$16/block

81 to 120 blocks
2M to 3M emails
$14/block

121 to 160 blocks
3M to 4M emails
$12/block

161+ blocks
4M+ emails
$10/block

*New transactional email users can get up to 500 free email sends to their verified domain. Restrictions apply.
Learn more

[H2] One reliable platform to simplify your stack – developers integrate once, marketers edit endlessly.

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[H3]
Streamlined template editing
Easy to edit and test templates with drag and drop builder for seamless collaboration between marketer and developer
Learn more

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[H3]
Developer documentation
Integrate with comprehensive SDK repositories, guides and connect your AI coding assistant directly through our first-party MCP server
Learn more

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[H3]
Transactional SMS
Trigger both transactional email and SMS messages from a single, reliable API
Learn more

[H2] 99% of emails sent reach their destined inbox—in less than a second. Start sending today.

Try for free

Contact Sales

[H2]
FAQs

[H3]

What is Transactional Email?

A transactional email is an email that is sent to an individual recipient following a commercial transaction or specific action performed by that person, such as a purchase in your connected store or a password reset request. Some other examples include one-time passcodes, order/shipping updates, payment confirmations, appointment reminders, and outage alerts. Learn more about how Transactional email works here.

[H3]

What is Transactional SMS?

Transactional SMS messages offer a direct and immediate way to communicate critical information to users. Unlike marketing SMS messages, transactional SMS messages are expected and often crucial for a user's interaction with a service or product.
Some examples include 2 factor-authentication codes, service outage notification, appointment update etc. Learn more about how Transactional SMS works.

[H3]

Do I need a Mailchimp account to send transactional messages?

Yes, you need a Mailchimp account.
Transactional Email is available as an add-on to Mailchimp’s Standard and Premium plans, or the legacy Monthly Plan. However, new transactional email users can try our free demo with certain limits.
Transactional SMS is available as an add-on to one of Mailchimp’s paid plans. You also need a Transactional enabled account (at least a free demo), SMS credits, and a phone number approved for sending SMS.
You can use Mailchimp Transactional for transactional sending without running marketing campaigns. A Mailchimp account/plan is required for access, billing, and platform features—especially when teams want marketers to manage template content while developers keep the API integration stable.

[H3]

Can I try Transactional Email before I buy?

Yes. New users get up to 500 free emails sends to their verified domain (restrictions apply). Learn more about how to try it for free.

[H3]

How does Transactional SMS pricing work?

Mailchimp Transactional SMS shares the same credits as the SMS marketing. Ex: If you purchase 10,000 SMS marketing credits - same credits can be used to send Transactional SMS or marketing SMS, depending on your business goals. These credits do not roll over between billing cycles. Transactional SMS is available in all the countries as SMS Marketing.
Learn more about SMS Marketing credits.

[H3]

Do you offer high-volume plans?

Yes. Our pricing scales for high-volume needs with lower per-block rates at higher volumes - Contact us to learn more about our high-volume pricing.
Currently, we’re also offering 50% off for over 1M Emails for 12 months. Contact sales to learn more.

[H3]

What happens if I run out of email blocks—or don’t use them all?

Set your account to automatically purchase email blocks when you reach your predefined limit, or opt for an alert that you're running low. Transactional sends are calculated in real time, so the system will stop sending emails when you’re out of blocks.
Unused emails in a block don’t roll over month to month.

[H3]

What if I need more help?

If you’re a Mailchimp customer, contact our support team, and they can take care of you.
If you’re a new customer and want to learn more about Transactional pricing, contact us here.

[H2]
Mailchimp for agencies
If you’re an agency, you probably want an agency account.

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[H2] You’ll be in good company

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*Disclaimers
50% Off 1M+ Emails 12 months Offer Terms: 50% off the monthly base price of Transactional Email at 1,000,000 or more emails (40 or more blocks) for the first 12 (twelve) months of service, starting from the date of enrollment, followed by the then-current monthly list price based on your monthly Transactional Email subscription. A block contains 25,000 transactional emails. To be eligible, you must be a new Mailchimp Transactional Email customer and enroll or be currently enrolled in a Standard or Premium marketing plan or Legacy Monthly plan (each a “Paid Marketing Plan”) with an account created within the last 90 days in select countries, and sign up for the Mailchimp Transactional Email monthly plan and purchase a minimum of 1,000,000 emails (40 or more blocks). Essentials plan is not eligible for Transactional Email. Mailchimp accounts with compliance holds or violations are ineligible. To redeem the offer, contact Sales at https://mailchimp.com/sales/. By clicking “Subscribe” or other similar wording at checkout, you agree to these offer terms. Discount applies only to the monthly Transactional Email subscription and the purchase of any top-off blocks for additional email sends. Valid payment information must be provided at the time of enrollment. Offer available for a limited time and is subject to certain restrictions. One offer per Mailchimp account. Offers are not eligible to be applied concurrently or consecutively. Any changes to your account, such as pausing, canceling, or downgrading, will immediately affect your access to Transactional Email and may terminate your promotional discount. See full offer terms for details. Terms, conditions, pricing, special features, and service and support options subject to change without notice.

Join our first Mailchimp Transactional event on June 4 at NYC Tech Week — save your spot

TRANSACTIONAL EMAILS & SMS
[H1] Transactional messaging built to scale with your business

Mailchimp can send up to 157 billion emails per month—it’s infrastructure you can count on no matter what your needs.

Sign up today

Talk to Sales

View documentation

[IMG: Collection of mobile app screens showing Tandu]

[IMG: Three mobile email notifications showing workout completion, review thanks, and account confirmation messages from a fitness app]

[H2]
Stay on-brand

Build emails from scratch or seamlessly import your Mailchimp templates.

[IMG: Professional working at modern desk with laptop, plants, and orange privacy screen in bright home office setting]

[H2]
Manage inbound email

Respond to emails with an action, like sending an RSVP or updating a to-do list.

[IMG: Person in blue jacket using smartphone while walking outdoors on sunny day, shown in multiple connected photos]

[H2]
Send from anywhere

Send from multiple domains or subdomains, all from one account

[H2] Transactional email by the numbers
Mailchimp transactional email & SMS is a dependable solution for businesses of all sizes—and we have the facts to back it up.

[H3] Average email delivery rate: 99%
Send urgent transactional emails with confidence.

[H3] Max email sends per month: Up to 157 billion
With the infrastructure to send up to 157 billion emails per month, we're a scalable platform that can handle any volume your business demands from startup to enterprise.

[H3] Reported transactional email uptime: 99.99%
Uptime past performance is not a guarantee of future performance and may be affected by factors outside of our control. View server status.

[H3] Median delivery speed: Less than 1 second
With a median delivery speed of less than one second, your critical transactional emails get to the inbox the moment they're needed.

[H3] Median bounce rate: 2.69%
Since 2018, Mailchimp Transactional has delivered over 300 billion emails while maintaining a median bounce rate of 2.69%

[H2] Fast, dependable transactional SMS messages
With Mailchimp’s updated transactional API, businesses can send critical 1:1 text messages via SMS as well as email.
Learn about transactional SMS

[IMG: Mobile interface showing password reset code FEC627 with profile photos connected by dotted lines in a circular pattern]

[H2]
Get started today

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

Best value
Best value

Recommended
Mailchimp Recommends

Mailchimp Recommends

[H2]
Premium
Scale fast with dedicated onboarding, unlimited contacts, and priority support; built for teams.

Talk to Sales
You've selected more contacts than this plan allows

Save 15% on 10,000+ contacts

£
263
21

/mo for 12 months

per month for 12 months

Then, starts at
/month†
per month†

Talk to Sales at

0800 086 8197

Contact Sales

Phone & Priority Support

Popup Forms

Multivariate and A/B Testing

Enhanced marketing automation flows

Dedicated Personalized Onboarding

Predictive Segmentation

Behavioral Targeting

Buy Now
Buy Now

Best value
Best value

Recommended
Mailchimp Recommends

Mailchimp Recommends

[H2]
Standard
Sell even more with personalization, optimization tools, and enhanced automations.

Contact limit exceeded
You've selected more contacts than this plan allows

Try for free
Try free for 14 days

Free
for 14 days

Then, starts at
0/month†
per month†

Save 15% on 10,000+ contacts
Save 15% on 10,000+ contacts

£
15
04

/mo for 12 months

per month for 12 months

Then, starts at
/month†
per month†

24/7 Email & Chat Support

Popup Forms

Multivariate & A/B Testing

Enhanced marketing automation flows

Personalized Onboarding

Predictive Segmentation

Behavioral Targeting

Sign Up Free
Sign Up Free

Buy Now
Buy Now

Contact limit exceeded
Limit

No Credit Card Required
Save 15% for 12 months

Best value
Best value

Recommended
Mailchimp Recommends

Mailchimp Recommends

[H2]
Essentials
Send the right content at the right time with testing and scheduling features.

Contact limit exceeded
You've selected more contacts than this plan allows

Try for free
Try free for 14 days

Free
for 14 days

Then, starts at
0/month†
per month†

Save 15% on 10,000+ contacts
Save 15% on 10,000+ contacts

£
9
78

/mo for 12 months

per month for 12 months

Then, starts at
/month†
per month†

24/7 Email & Chat Support

Popup Forms

A/B Testing

Basic marketing automation flows
Personalized Onboarding
Predictive Segmentation
Behavioral Targeting

Sign Up Free
Sign Up Free

Buy Now
Buy Now

Contact limit exceeded
Limit

No Credit Card Required
Save 15% for 12 months

Best value
Best value

Recommended
Mailchimp Recommends

Mailchimp Recommends

[H2]
Free
Easily create email campaigns and learn more about your customers.

Contact limit exceeded
You've selected more contacts than this plan allows

Limit of 250 contacts

£
0

/month†
per month†

Email support for first 30 days

Popup Forms
A/B Testing
Basic marketing automation flows
Onboarding
Predictive Segmentation
Behavioral Targeting

Sign Up Free
Sign Up Free

Contact limit exceeded
Limit

†See Free Trial Terms and Offer Terms. Send up to 100 emails without payment info.
Overages
apply if contact or email send limit is exceeded. Free plan sending will be paused if contact or email send limit is exceeded. Learn more.

See all plan details

[H2] Customize your settings from start to send

[H3] Stay on-brand
Build emails from scratch or seamlessly import your Mailchimp templates.

[H3] Manage inbound email
Respond to emails with an action, like sending an RSVP or updating a to-do list.

[H3] Send from anywhere
Send from multiple domains or subdomains, all from one account.

[IMG: Two small-business owners contacting Mailchimp’s customer support team.]

[H3] Get world class support
Get in touch with our award-winning Support team for troubleshooting.
Learn more

[H3] Learn more about Mailchimp transactional APIs and get started.

Transactional Email Pricing

API Documentation

[H2]
FAQs

[H3]

What’s the difference between Mandrill and Mailchimp Transactional?

Mandrill was the original name for Mailchimp's transactional email service. It was rebranded in fall 2025 to Mailchimp Transactional to better reflect how it fits within the broader Mailchimp platform.
The product still offers the same reliable transactional email infrastructure but now also includes transactional SMS, giving you more ways to reach customers with time-sensitive messages like order confirmations, shipping updates, and password resets.

[H3]

Why did we rebrand Mandrill to Mailchimp Transactional?

The rebrand brings transactional messaging under the same roof as your marketing tools. With Mailchimp Transactional, your marketing and transactional emails live in one unified platform, so you can manage everything from a single place.
Marketers can also make edits to transactional email templates directly within Mailchimp without needing to loop in a developer, which speeds up workflows and gives your team more control over the customer experience.

[H3]

What is transactional SMS?

Transaction SMS refers to automated text messages sent to subscribers based on actions they take or events related to their accounts. These messages include:
Order confirmations
Shipping notifications
Appointment reminders
Password resets
Account alerts
Unlike promotional messages, transactional SMS provides information that customers need or requested through their interaction with your business.

[H3]

What are the benefits of using transactional SMS?

Transactional SMS offers several advantages for businesses and customers, including:
Immediate delivery: Messages arrive within seconds, making them ideal for time-sensitive information like delivery updates or verification codes.
High open rates: Most people read text messages within minutes of receiving them, so your important updates actually get seen.
Better customer experience: Customers appreciate getting relevant information when they need it, like confirmation that their order went through or a reminder about an upcoming appointment.
Increased trust: Sending timely updates shows customers you’re on top of things and keeping them informed.
This impact varies by industry. For example:
Healthcare providers can reduce no-shows by sending appointment reminders the day before scheduled visits.
E-commerce businesses see fewer customer service inquiries when they send real-time shipping and delivery notifications.
Financial services companies can improve security and reduce fraud by sending two-factor authentication codes for account access.

[H3]

How can I use transactional SMS?

You can set up transactional SMS to send automatically when certain triggers occur. Common uses include:
Sending order confirmations when someone makes a purchase
Delivery notifications when items ship
Appointment reminder the day before scheduled services
Two-factor authentication codes for account security
The messages go out automatically based on customer actions, so you don’t have to send each one manually.
With Mailchimp, transactional SMS is set up through the Transactional API. Messages are triggered automatically based on customer actions in your system, like completing a purchase or requesting a password reset.
You can also use webhooks to track message events in real time, including when messages are sent, delivered, clicked, or if recipients unsubscribe. With this information, you have complete visibility into how your messages are performing.

[H3]

Does Mailchimp have transactional SMS?

Yes, Mailchimp offers transactional SMS capabilities. You can set up automated text messaging to send communications based on customer behavior and actions.
The feature integrates with your existing workflows, so you can manage both your marketing messages and transactional notifications from one platform.
There are a few requirements to get started. Your Mailchimp account needs to be on a Essentials plan or higher, and you’ll need to set up a text messaging credit plan with an approved sending number. Once your account is ready, you can apply for SMS access and buy credits directly in Mailchimp.

[H3]

Does Mailchimp transactional email have reliable deliverability?

Yes. Mailchimp Transactional email delivers 99% of emails successfully, operates with 99.99% uptime, and gets messages to the inbox in under one second. The infrastructure supports up to 157 billion emails per month, so it scales whether you're a growing business or an enterprise operation.
That level of reliability matters for both marketers and developers. Marketers need confidence that receipts, shipping notifications, and account updates are actually reaching customers — because a missed transactional email can erode trust fast.
Developers need an infrastructure they can count on without constant monitoring, especially when sending at high volumes or integrating transactional messaging across multiple systems.

[H3]

Do customers need to opt in to receive transactional SMS?

Yes, customers need to opt in before you can send them transactional SMS. This means they must give you explicit permission to contact them via text message, even for non-promotional messages like order confirmations or shipping updates.
It’s important to note that email consent is different from SMS consent. Even if a customer has opted in to receive emails from you, you need to obtain separate SMS consent before sending them text messages. This is required by Mailchimp’s Standard Terms of Use and applicable laws.
Getting proper opt-in is essential for several reasons:
Legal compliance: SMS messaging regulations like the Telephone Consumer Protection Act (TCPA) in the United States and similar laws in other countries require that businesses get permission before texting customers. Without proper consent, you risk facing substantial penalties and potential lawsuits.
Customer privacy and trust: Requiring opt-in respects your customers’ preferences and privacy. Not everyone wants to receive text messages, even for important updates, so giving them control over how you contact them builds trust.
Better engagement: Customers who actively opt in are more likely to engage with your messages since they’ve chosen to receive them.

[H3]

What’s the difference between promotional SMS and transactional SMS?

The key difference between promotional and transactional SMS comes down to purpose and content.
Promotional SMS refers to marketing messages designed to promote products, services, sales, or special offers. They’re used to drive engagement and sales.
Transactional SMS refers to messages that provide information related to a specific transaction or account activity that the customer initiated. They’re informational rather than promotional, like order confirmations or shipping updates.
For example, a text about a 20% off sale is promotional, while a text confirming that an order shipped is transactional.

[H3]

What is a Mailchimp transactional email?

Mailchimp transactional email is a delivery API, or application programming interface, that can deliver transactional emails to customers without you overseeing the process.
Transactional emails, also known as “triggered emails,” are one-to-one messages sent when a specific action occurs or a request is made from the contact.
For example, a customer may receive a transactional email with their order information after a purchase is complete. Other examples of transactional emails include account updates, password reminders, and notifications or alerts.
Compared to bulk marketing messages, transactional emails are only sent to one individual at a time rather than a group of people.
Typically, these emails are time-sensitive and require you to deliver messages quickly. With our transactional email service, you can automatically send messages to the recipient’s email server.
When you send a transactional email with Mailchimp, you can ensure customers receive the i

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TRANSACTIONAL EMAILS & SMS
[H1] Transactional messaging built to scale with your business

Mailchimp can send up to 157 billion emails per month—it’s infrastructure you can count on no matter what your needs.

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[H2]
Stay on-brand

Build emails from scratch or seamlessly import your Mailchimp templates.

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[H2]
Manage inbound email

Respond to emails with an action, like sending an RSVP or updating a to-do list.

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[H2]
Send from anywhere

Send from multiple domains or subdomains, all from one account

[H2] Transactional email by the numbers
Mailchimp transactional email & SMS is a dependable solution for businesses of all sizes—and we have the facts to back it up.

[H3] Average email delivery rate: 99%
Send urgent transactional emails with confidence.

[H3] Max email sends per month: Up to 157 billion
With the infrastructure to send up to 157 billion emails per month, we're a scalable platform that can handle any volume your business demands from startup to enterprise.

[H3] Reported transactional email uptime: 99.99%
Uptime past performance is not a guarantee of future performance and may be affected by factors outside of our control. View server status.

[H3] Median delivery speed: Less than 1 second
With a median delivery speed of less than one second, your critical transactional emails get to the inbox the moment they're needed.

[H3] Median bounce rate: 2.69%
Since 2018, Mailchimp Transactional has delivered over 300 billion emails while maintaining a median bounce rate of 2.69%

[H2] Fast, dependable transactional SMS messages
With Mailchimp’s updated transactional API, businesses can send critical 1:1 text messages via SMS as well as email.
Learn about transactional SMS

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[H2]
Get started today

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

Free Trial of Premium for 1 Month and plans for large contact lists available. Talk to our Sales team at 0800 086 8197 or contact us.

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[H2] Customize your settings from start to send

[H3] Stay on-brand
Build emails from scratch or seamlessly import your Mailchimp templates.

[H3] Manage inbound email
Respond to emails with an action, like sending an RSVP or updating a to-do list.

[H3] Send from anywhere
Send from multiple domains or subdomains, all from one account.

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[H3] Get world class support
Get in touch with our award-winning Support team for troubleshooting.
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[H3] Learn more about Mailchimp transactional APIs and get started.

Transactional Email Pricing

API Documentation

[H2]
FAQs

[H3]

What’s the difference between Mandrill and Mailchimp Transactional?

Mandrill was the original name for Mailchimp's transactional email service. It was rebranded in fall 2025 to Mailchimp Transactional to better reflect how it fits within the broader Mailchimp platform.
The product still offers the same reliable transactional email infrastructure but now also includes transactional SMS, giving you more ways to reach customers with time-sensitive messages like order confirmations, shipping updates, and password resets.

[H3]

Why did we rebrand Mandrill to Mailchimp Transactional?

The rebrand brings transactional messaging under the same roof as your marketing tools. With Mailchimp Transactional, your marketing and transactional emails live in one unified platform, so you can manage everything from a single place.
Marketers can also make edits to transactional email templates directly within Mailchimp without needing to loop in a developer, which speeds up workflows and gives your team more control over the customer experience.

[H3]

What is transactional SMS?

Transaction SMS refers to automated text messages sent to subscribers based on actions they take or events related to their accounts. These messages include:
Order confirmations
Shipping notifications
Appointment reminders
Password resets
Account alerts
Unlike promotional messages, transactional SMS provides information that customers need or requested through their interaction with your business.

[H3]

What are the benefits of using transactional SMS?

Transactional SMS offers several advantages for businesses and customers, including:
Immediate delivery: Messages arrive within seconds, making them ideal for time-sensitive information like delivery updates or verification codes.
High open rates: Most people read text messages within minutes of receiving them, so your important updates actually get seen.
Better customer experience: Customers appreciate getting relevant information when they need it, like confirmation that their order went through or a reminder about an upcoming appointment.
Increased trust: Sending timely updates shows customers you’re on top of things and keeping them informed.
This impact varies by industry. For example:
Healthcare providers can reduce no-shows by sending appointment reminders the day before scheduled visits.
E-commerce businesses see fewer customer service inquiries when they send real-time shipping and delivery notifications.
Financial services companies can improve security and reduce fraud by sending two-factor authentication codes for account access.

[H3]

How can I use transactional SMS?

You can set up transactional SMS to send automatically when certain triggers occur. Common uses include:
Sending order confirmations when someone makes a purchase
Delivery notifications when items ship
Appointment reminder the day before scheduled services
Two-factor authentication codes for account security
The messages go out automatically based on customer actions, so you don’t have to send each one manually.
With Mailchimp, transactional SMS is set up through the Transactional API. Messages are triggered automatically based on customer actions in your system, like completing a purchase or requesting a password reset.
You can also use webhooks to track message events in real time, including when messages are sent, delivered, clicked, or if recipients unsubscribe. With this information, you have complete visibility into how your messages are performing.

[H3]

Does Mailchimp have transactional SMS?

Yes, Mailchimp offers transactional SMS capabilities. You can set up automated text messaging to send communications based on customer behavior and actions.
The feature integrates with your existing workflows, so you can manage both your marketing messages and transactional notifications from one platform.
There are a few requirements to get started. Your Mailchimp account needs to be on a Essentials plan or higher, and you’ll need to set up a text messaging credit plan with an approved sending number. Once your account is ready, you can apply for SMS access and buy credits directly in Mailchimp.

[H3]

Does Mailchimp transactional email have reliable deliverability?

Yes. Mailchimp Transactional email delivers 99% of emails successfully, operates with 99.99% uptime, and gets messages to the inbox in under one second. The infrastructure supports up to 157 billion emails per month, so it scales whether you're a growing business or an enterprise operation.
That level of reliability matters for both marketers and developers. Marketers need confidence that receipts, shipping notifications, and account updates are actually reaching customers — because a missed transactional email can erode trust fast.
Developers need an infrastructure they can count on without constant monitoring, especially when sending at high volumes or integrating transactional messaging across multiple systems.

[H3]

Do customers need to opt in to receive transactional SMS?

Yes, customers need to opt in before you can send them transactional SMS. This means they must give you explicit permission to contact them via text message, even for non-promotional messages like order confirmations or shipping updates.
It’s important to note that email consent is different from SMS consent. Even if a customer has opted in to receive emails from you, you need to obtain separate SMS consent before sending them text messages. This is required by Mailchimp’s Standard Terms of Use and applicable laws.
Getting proper opt-in is essential for several reasons:
Legal compliance: SMS messaging regulations like the Telephone Consumer Protection Act (TCPA) in the United States and similar laws in other countries require that businesses get permission before texting customers. Without proper consent, you risk facing substantial penalties and potential lawsuits.
Customer privacy and trust: Requiring opt-in respects your customers’ preferences and privacy. Not everyone wants to receive text messages, even for important updates, so giving them control over how you contact them builds trust.
Better engagement: Customers who actively opt in are more likely to engage with your messages since they’ve chosen to receive them.

[H3]

What’s the difference between promotional SMS and transactional SMS?

The key difference between promotional and transactional SMS comes down to purpose and content.
Promotional SMS refers to marketing messages designed to promote products, services, sales, or special offers. They’re used to drive engagement and sales.
Transactional SMS refers to messages that provide information related to a specific transaction or account activity that the customer initiated. They’re informational rather than promotional, like order confirmations or shipping updates.
For example, a text about a 20% off sale is promotional, while a text confirming that an order shipped is transactional.

[H3]

What is a Mailchimp transactional email?

Mailchimp transactional email is a delivery API, or application programming interface, that can deliver transactional emails to customers without you overseeing the process.
Transactional emails, also known as “triggered emails,” are one-to-one messages sent when a specific action occurs or a request is made from the contact.
For example, a customer may receive a transactional email with their order information after a purchase is complete. Other examples of transactional emails include account updates, password reminders, and notifications or alerts.
Compared to bulk marketing messages, transactional emails are only sent to one individual at a time rather than a group of people.
Typically, these emails are time-sensitive and require you to deliver messages quickly. With our transactional email service, you can automatically send messages to the recipient’s email server.
When you send a transactional email with Mailchimp, you can ensure customers receive the i