Abnormal Security vs Postmark Comparison (2026)

What are the differences between Abnormal Security and Postmark?

Forward Email Team
Written by
Forward Email TeamVerified
Published
1/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Abnormal Security.

Email Service Comparison

20 facts in comparison
Abnormal Securityvs.Postmark

Abnormal Security

Cloud Email Security - Block Malicious Email Attacks
"Cloud Email Security - Block Malicious Email Attacks"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

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
Requires you to talk to a sales teamPricing$15/mo
Requires 3rd partyStorageNo Postmark does not support storage
UnknownAttachments10 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI TTI
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPNo
❌ Requires 3rd partyPOP3No
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Abnormal Security

Abnormal Security is a closed-source email service. Its description from its website is: Cloud Email Security - Block Malicious Email Attacks

Abnormal Security is a closed-source email service.
Screenshot by Forward Email
Visit Website
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.
Photo by Forward Email
Visit Website

Compare Abnormal Security with 78 email services