Altospam vs ImprovMX Comparison (2026)

What are the differences between Altospam and ImprovMX?

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 Altospam.

Email Service Comparison

20 facts in comparison
Altospamvs.ImprovMX

Altospam

Antispam, Antivirus & Anti-Phishing Software
"Antispam, Antivirus & Anti-Phishing Software"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

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
Requires you to talk to a sales teamPricing$9/mo
Requires 3rd partyStorageNo ImprovMX does not support storage
UnknownAttachments50 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

Altospam

Altospam is a closed-source email service. Their official description reads: Antispam, Antivirus & Anti-Phishing Software

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