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SquirrelMail and Pagkugi

Long-lived PHP IMAP webmail with plugins.

At a glance

Simple IMAP webmail, plugins, and a long history.

Where Pagkugi differs. A legacy server-side webmail, not a local Maildir client.

Status
Maintained, legacy
License
GPL-2.0
Platforms
Browser, self-hosted
Storage
Live IMAP; no local mail store.
Website
https://squirrelmail.org/
Source
https://github.com/squirrelmail/squirrelmail

Where SquirrelMail is better

  • Simple self-hosted IMAP webmail.
  • A large plugin set.
  • Very low system requirements.

Storage and ownership

Where the mail actually lives, and whether it survives the client.

Feature Pagkugi SquirrelMail
Open local storage Yes No
Maildir as the live store Yes No
Works offline Yes No

Accounts and protocols

The servers and providers the client can talk to.

Feature Pagkugi SquirrelMail
IMAP and SMTP Yes Yes
POP3 No Not in the first release. No
Gmail account No Provider-specific account model is not supported. Yes
Microsoft / Exchange No Exchange-specific account model is not supported. Limited
JMAP No No

Reading

How a message is presented, and what happens to HTML.

Feature Pagkugi SquirrelMail
In-app HTML rendering No Mail is converted to text instead. Limited
HTML converted to text Yes Yes
Conversation threading Yes Yes
Calendar invitations Limited A focused read-only viewer, not a calendar application. No

Writing and organizing

Composition, search, and the tools that shape a mailbox.

Feature Pagkugi SquirrelMail
Rich or HTML composition No Composes text/plain; Markdown composition is not released. Limited
Snooze or send later No No
Full-text search Yes Yes
Custom incoming filters No The local filter engine is implemented but switched off. Plugin Filters plugin.
Tags or labels No Read state only; no general labels or tags. Limited
Mailing-list actions Yes No
Command palette or keyboard-first No Actions live in explicit context menus. Limited
Open-thread work view Yes No

Security and privacy

Encryption, sender checks, and what leaves the machine.

Feature Pagkugi SquirrelMail
PGP / S/MIME No Not built in. Plugin
Phishing or sender checks Yes Limited
Remote content blocked Yes Limited
Built-in AI features No No assistant, by design. No

Platform and business

Where it runs, how it extends, and how it is sold.

Feature Pagkugi SquirrelMail
Graphical desktop app Yes No
Terminal interface No No
Mobile app No No
Web or self-hosted No Yes
Calendar, contacts, or groupware No No
Plugin or extension system No Yes
Open source No Proprietary commercial software. Yes
No account with its maker Yes No

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