About
SquirrelMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP protocol and all the other features required for a web-based email client.
Pricing
Pricing Type
Open Source
Free tier available
Billing
One-time payment
Last checked: February 17, 2026
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Key Facts
Categories
Platforms
Web
Company
SquirrelMail Project
Founded
Founded in 1999
Country
Global
Language
English