ImprovMX vs Postmark Comparison (2025)

What are the differences between ImprovMX and Postmark?

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 ImprovMX.

Email Service Comparison

20 facts in comparison
ImprovMXvs.Postmark

ImprovMX

Create free email aliases for your domain name
"Create free email aliases for your domain name"
  • 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
$9/moPricing$15/mo
No ImprovMX does not support storageStorageNo Postmark does not support storage
50 MBAttachments10 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
TTI TTI TTI
YesSMTPYes
NoIMAPNo
NoPOP3No
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

ImprovMX

ImprovMX is a closed-source email service. Their official description reads: Create free email aliases for your domain name

ImprovMX is a closed-source email service.
Screenshot by Forward Email
Go to site
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
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Compare ImprovMX with 78 email services