ImprovMX vs Heimdal Comparison (2025)

What are the differences between ImprovMX and Heimdal?

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.Heimdal

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.

Heimdal

One Platform. Total Security.
"One Platform. Total Security."
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$9/moPricingRequires you to talk to a sales team
No ImprovMX does not support storageStorageRequires 3rd party
50 MBAttachmentsUnknown
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
TTI TTI No
YesSMTP❌ Requires 3rd party
NoIMAP❌ Requires 3rd party
NoPOP3❌ Requires 3rd party
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

ImprovMX

ImprovMX is a closed-source email service. Its description from its website is: Create free email aliases for your domain name

ImprovMX is a closed-source email service.
Photograph by Forward Email
Go to site
Closed-source

Heimdal

Heimdal is a closed-source email service. Their official description reads: One Platform. Total Security.

Heimdal is a closed-source email service.
Photograph by Forward Email
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Compare ImprovMX with 78 email services