Set up DMARC and see who's sending email using your brand's domain.

Looking for a Mailchimp Transactional (formerly Mandrill) alternative?

Postmark offers great deliverability as standard, and a helping hand whenever you need one.

Exceptional deliverability for everyone

Your customers expect application emails to arrive immediately—not eventually. We don't just claim great deliverability. We share live delivery data so you can judge for yourself.

  • Gmail

  • Apple

  • Hotmail

  • AOL

  • Yahoo

Time to Inbox data updated every 5 minutes

With most providers, when deliverability issues arise, they suggest that paying more for a dedicated IP address will fix the problems. We believe that's an abdication of responsibility to ensure your emails reach customers every time. It’s our job to provide you with great deliverability with or without dedicated IP addresses.

Whether you send thousands of emails or millions of emails, you’ll see the same quality of deliverability across our entire service. You'll be hard-pressed to find a provider more willing to stand by the quality of their shared IPs than Postmark. If or when the time comes that a dedicated IP address makes sense, we'll set you up on one.

Great support at no extra cost

Everyone says they have great support. Then you notice they sell an upgraded version of dedicated support for customers who are willing to pay extra.

Customer Happiness Rating
  • 😃 Great (96%)
  • 🙂 Okay (1%)
  • 😔 Not Good (3%)

Customer feedback gathered through Help Scout over the past 60 days.

There’s no VIP section for support with Postmark. You can email us and usually hear back in a couple of hours, or you can reach us via live chat during business hours. If you’re having delivery problems, we’ll never tell you to just upgrade to a dedicated IP address. We’ll dive in and help you get to the bottom of things.

We also have comprehensive developer documentation and a support center packed full of resources to keep you going when our support team is enjoying some well-earned downtime with their families.

We’re here to help!

Take a moment to meet our customer success team.

  • Abdullah Al-hennawy Abdullah
  • Anita Pericic Anita
  • Anna Ward Anna
  • Brian Kerr Brian
  • Dana Chaby Dana
  • Fionnuala Walls Fionnuala
  • Ignacio Roig Ignacio
  • Jordan Dibb Jordan
  • Natalie Keshlear Natalie
  • Natalie Robles Natalie
  • Shelley Jeżewska Shelley
Clipboard with a checklist.

What would it take to switch from Mailchimp Transactional to Postmark?

We’ve put together a comprehensive getting started guide with everything you need to know about sending your emails through Postmark.

Postmark vs. Mailchimp Transactional

Postmark is an excellent Mailchimp Transactional alternative, providing everything you’ll need for sending application emails, processing inbound email, and tracking user engagement.

Postmark Mandrill
Transactional emails
Bulk/broadcast email
(New in Postmark: Send your promotional or bulk email via Broadcast Message Streams.)
Separate infrastructure for transactional and bulk email
Comprehensive official libraries
Community libraries
Spam score checking
Spam complaint handling
Bounce handling
Shared IPs
Dedicated IPs
(Auto-managed based on individual sending volume)
Separate environments with servers
Pre-made email templates
Template engine
Inbox preview
(Available when you send with Postmark Templates)
($3/test for Litmus Visual tests)
Scheduled delivery
A/B testing
Email address validation
Seen something inaccurate? Let us know.
Postmark Mandrill
Inbound email processing
RegEx matching on all email headers ("routes")
Chain multiple filters
UTF-8 encoding
Strip signature and quote blocks
Spam filtering
Seen something inaccurate? Let us know.
Postmark Mandrill
Delivery rates
Bounce rates
Open rates
Click tracking
Unsubscribe tracking
Spam rates
Full message storage
(45 days)
(30 days)
Automatic tagging
Custom tagging
Custom header metadata tag
Custom tracking domain
Geolocation data
Email client and device tracking
Real-time notifications
Seen something inaccurate? Let us know.
Postmark Mandrill
Time to Inbox
System availability API
Service availability API
Seen something inaccurate? Let us know.
Postmark Mandrill
Opportunistic TLS
Enforced TLS
Seen something inaccurate? Let us know.

Customers that already made the switch

I’ve used SendGrid, Mandrill and Postmark for transactional email in production. Amazing how much better Postmark is than everyone else.

Andreas Zecher

Andreas Zecher

Founder and Developer at Promoter

You go above and beyond to make sure your customers understand transactional email. The educational material you provide make me want to use you. But then there is also the fact (which made me seek you out in the first place) that you take deliverability very seriously. You fixed a problem I had with deliverability in Mandrill. An awesome service.

Tim Horton

Tim Horton

Partner at Succession Link

As a solo founder, I'm always reviewing and evaluating 3rd party providers. Can I get a better deal? Can I find another service that is more reliable? I’ve stopped asking those questions with Postmark. It hits the trifecta of great customer support, excellent service, and good/affordable pricing. I’m all in for Postmark!

Philip Manavopoulos

Philip Manavopoulos

Founder at Doorbell

My customers are so confident in their transactional email now, that they no longer include 'check in your spam box' in their website messaging anymore. Account email confirmations and missing invoices are a thing off the past. The activity feed gives myself and my customers total confidence in using email for important tasks again.

Jonathan Malko

Jonathan Malko

Owner at

You have an excellent user interface and very good spam reputation service. Combined with the pay-what-you-use subscription a better alternative to Mailchimp and its expensive Mandrill moneymaking machine.

P. Schipper

Digital Creative at Creative Kids Concepts

Easy to set up. Great API. Rapid mail delivery and no spam issues. We moved from Mandrill because of terrible deliverability and am pleased to say it’s been well worthwhile....we’ve even saved money. Thanks Postmark Team….you rock!!

Ben Jemison

General Manager at CircleLoop

How much does Postmark cost?

10,000 emails
125,000 emails
700,000 emails
Annual Savings $300 /year $60 /year $828 /year
Postmark Includes great deliverability and support as standard $15 /mo. $115 /mo. $455 /mo.
Mandrill Includes the required subscription to a paid MailChimp plan $40.00 /mo. $120.00 /mo. $524.00 /mo.

Do you offer a free trial?

All new accounts start off on our free developer plan with 100 emails per month. Use it for however long you need, it doesn’t expire.

Do you offer dedicated IPs?

Dedicated IPs are available to high-volume senders. Read about our policy for issuing dedicated IPs.

What happens if I go over my plan’s monthly email limit?

Extra emails on our paid plans are calculated at the end of your billing cycle and included with your plan cost for the upcoming month.

What payment types do you accept?

We accept payments via Visa, MasterCard, American Express, Diners, and JCB. We do not accept PayPal or Purchase Orders.

Can I send bulk marketing email through Postmark?

Yes you can! To comply with industry best-practices and to maintain our high deliverability, it's important though that transactional and marketing emails never mix. That's why we created Message Streams, a parallel but completely separate sending infrastructures for your transactional and broadcast emails.

Do you offer high-volume plans?

Yes! Contact us to learn more about our high-volume pricing.

Let’s put an end to deliverability issues

Fast and reliable delivery. Extensive API documentation. Fantastic support.

Join the thousands of companies that already trust Postmark