Posteo vs Spam Scanner Comparison (2026)

What are the differences between Posteo and Spam Scanner?

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 Posteo.

Email Service Comparison

20 facts in comparison
Posteovs.Spam Scanner

Posteo

Green, secure, ad-free
"Green, secure, ad-free"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Spam Scanner

Spam Scanner is the best anti-spam, email filtering, and phishing prevention service
"Spam Scanner is the best anti-spam, email filtering, and phishing prevention service"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
€1/moPricingFree (built-in to Forward Email)
2 GBStorageRequires 3rd party
50 MBAttachmentsUnknown
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
YesSMTP❌ Requires 3rd party
YesIMAP❌ Requires 3rd party
YesPOP3❌ Requires 3rd party
NoAPIYes
⚠️ Opt-inE2EE No
YesOpenPGP No
YesWKD No

Email Service Screenshots

Closed-source

Posteo

Posteo is a closed-source email service. Their website says: Green, secure, ad-free

Posteo is a closed-source email service.
Photo by Forward Email
Visit Website
Closed-source

Spam Scanner

Spam Scanner is a closed-source email service. Its description from its website is: Spam Scanner is the best anti-spam, email filtering, and phishing prevention service

Spam Scanner is a closed-source email service.
Photograph by Forward Email
Visit Website

Compare Posteo with 78 email services