Mailinblack vs Fastmail Comparison (2026)

Compare Mailinblack vs Fastmail email services. In-depth analysis of features, pricing, security, privacy, and storage to find the best email provider for your needs.

Forward Email Team
Written by
Forward Email TeamVerified
Published
4/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Mailinblack. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Mailinblackvs.Fastmail

Mailinblack

Your cybersecurity is our job
"Your cybersecurity is our job"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Fastmail

Fast, private email that’s just for you
"Fast, private email that’s just for you"
  • 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$3/mo
Requires 3rd partyStorage2 GB
UnknownAttachments70 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPYes
❌ Requires 3rd partyPOP3Yes
YesAPINo
NoE2EE No
NoOpenPGP ⚠️ Fastmail does support PGP, but not in their webmail; see this blog post for insight
NoWKD No

Email Service Screenshots

Closed-source

Mailinblack

Mailinblack is a closed-source email service. Its description from its website is: Your cybersecurity is our job

Mailinblack is a closed-source email service.
Photo by Forward Email
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Closed-source

Fastmail

Fastmail is a closed-source email service. Its description from its website is: Fast, private email that’s just for you

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