moin-user is the main MoinMoin mailing list. Talk on it as a user, plugin writer, or developer.
Archives are available via the Sourceforge archives or the Gmane archives.
There's an old devel mailing list (Gmane archives), but it's been discontinued since 2005. Please use the above list instead.
For other support alternatives, see the MoinMoinWiki page.
Do not mail the authors directly.