There are several email lists that exist for discussion of the MediaWiki software. Note that these lists are not appropriate places for discussing issues with Wikipedia or any other Wikimedia Foundation wiki. The complete list of all MediaWiki mailing lists is on Meta.
The lists are all available as ordinary email discussion lists, which you may subscribe to by using the links in the table below.
|mediawiki-l||For administrators and users of the MediaWiki software in non-Wikimedia-related projects, including some feature and development discussion. If you are having difficulty with your own installation of MediaWiki, then this is the place to ask for help.||Platonides|
|wikitech-l||For discussion of technical issues with Wikimedia servers, features and development of the MediaWiki software, etc. This is not a forum for user help (see mediawiki-l, above). Some more information is available at wikitech-l.||Platonides|
|mediawiki-announce||A low traffic list for announcements about new MediaWiki releases and security updates. All messages to this list also go to mediawiki-l, so you don't need to be on both.||Sam Reed|
|mediawiki-api-announce||A low-traffic list for announcements about the API, such as breaking changes and new MediaWiki releases. All messages to this list also go to mediawiki-api, so you don't need to be on both.||Roan Kattouw|