NOTE: This plugin is has now been part of the SquirrelMail distribution for quite a while. Therefore, it's no longer maintained seperately. If you're using an older version of SM you can download the plugin here. Else, it's included in your distribution.

This plugin gives the user a menu of mailinglist options such as (un)subscribe, help, archives and post/reply to list when viewing messages from compliant mailinglists.

It's an implementation of RFC 2369, "The Use of URLs as Meta-Syntax for Core Mail List Commands and their Transport through Message Header Fields".

Compliant mailinglistservers add extra headers with each message they send out with information about how to (un)subscribe, get help or contact the list owner. This can either be a web location or an emailaddress. In the latter case, one needs to send an email to that address in order to complete an action like subscribing.

The information in these headers is used to generate an extra menuline on messages containing one or more of these headers to help users taking advantage of the features offered.

Older versions