Postmark vs Amazon Simple Email Service (SES) Comparison (2025)

What are the differences between Postmark and Amazon Simple Email Service (SES)?

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 Simple Email Service (SES)

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 Simple Email Service (SES)

Get reliable, scalable email to communicate with customers at the lowest industry prices
"Get reliable, scalable email to communicate with customers at the lowest industry prices"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$15/moPricing$X/mo; varies, using shared IP's from SES are known to have negative effect on deliverability
No Postmark does not support storageStorageNo Amazon Simple Email Service (SES) does not support storage
10 MBAttachments10 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
TTI TTI No
YesSMTPYes
NoIMAPNo
NoPOP3No
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Postmark

Postmark is a closed-source email service. Their website says: The email delivery service that people actually like

Postmark is a closed-source email service.
Screenshot by Forward Email
Go to site
Closed-source

Amazon Simple Email Service (SES)

Amazon Simple Email Service (SES) is a closed-source email service. Their website says: Get reliable, scalable email to communicate with customers at the lowest industry prices

Amazon Simple Email Service (SES) is a closed-source email service.
Photograph by Forward Email
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Compare Postmark with 78 email services