Basic IMAP: the PHP 8.4 extension removal is not a Windows problem (issue #50) chris18890 is right that the 8.4 section was framed as Windows-only. ext/imap was unbundled from PHP core in 8.4.0, so it hits every OS. Corrected with the verified per-distro picture rather than a blanket warning: Ubuntu ships the PECL rebuild as php8.4-imap in universe from 25.10, so apt still works there. Debian 13 is the one with no clean answer — php-imap is in neither trixie nor trixie-backports, only experimental — and 'apt install php-imap', which this page told people to run, fails outright. Also states the ZTS caveat we had been quietly contradicting: php.net says the extension should not be used with thread-safe builds, and Apache on Windows is always thread-safe.
Basic IMAP: add PHP 8.4+ (Windows) extension install instructions imap was removed from PHP core in 8.4, so Windows/WAMP/XAMPP users on 8.4+ must download the DLL from PECL rather than uncommenting a line. Added the PECL link and a build-matching note (Apache = Thread Safe, so use the TS / x64 / VS17 build), plus where to put the DLL and which php.ini to edit.
Basic IMAP mailboxes: mark shipped, expand to full setup guide The feature is now built in freeitsm-app (#776): a third mailbox provider (username/password IMAP + SMTP). Rewrote the page from a roadmap note into a user-facing setup guide (steps, server requirement, troubleshooting) and dropped the "(planned)" qualifiers from the Mailbox-Authentication cross-links.
Add Basic IMAP / SMTP mailboxes page (planned) New roadmap page documenting the design for connecting a plain username/password IMAP+SMTP mailbox as a third provider alongside Microsoft 365 and Google Workspace. Cross-linked from the Mailbox Authentication page and added to the sidebar.