This dir has some assorted bits of documentation about SquirrelMail internals, useful for people that want to change or extend SquirrelMail.
More information about SquirrelMail development can be found on our website and via the firstname.lastname@example.org mailinglist (requires subscription before you can post).
Plugin hooks and functions
Mailbox tree functions
List of RFC documents used in SquirrelMail
MIME bodystructure handling
Creating compose links the right way