Postmark vs Amazon Workmail Comparison (2025)

What are the differences between Postmark and Amazon Workmail?

Forward Email Team
Written by
Forward Email TeamVerified
Published
7/1/25
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Postmark.

Email Service Comparison

20 facts in comparison
Postmarkvs.Amazon Workmail

Postmark

The email delivery service that people actually like
"The email delivery service that people actually like"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Amazon Workmail

Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email client applications
"Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email client applications"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$15/moPricing$4/mo
No Postmark does not support storageStorage50 GB
10 MBAttachments25 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
TTI TTI No
YesSMTPYes
NoIMAPYes
NoPOP3No
YesAPINo
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Postmark

Postmark is a closed-source email service. According to their website: The email delivery service that people actually like

Postmark is a closed-source email service.
Photograph by Forward Email
Visit Website
Closed-source

Amazon Workmail

Amazon Workmail is a closed-source email service. Their official description reads: Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email client applications

Amazon Workmail is a closed-source email service.
Photograph by Forward Email
Visit Website

Compare Postmark with 78 email services