[A thread for discussing tips, and sharing how-to. Updates should be made (by anyone confident) to https://meta.wikimedia.org/wiki/Mailing_lists/Administration *Non-private questions should be asked at the talkpage there.* Mute this thread if you don't want to see it and you use an email program that enables that... :-) ]
Re: SpamAssassin's X-Spam-Score - There was a bugzilla/phab task related to spam, at https://phabricator.wikimedia.org/T58525 ("Improve spam filtering for Mailman mailing lists") I've asked for an update and details about what we should use, at https://meta.wikimedia.org/wiki/Talk:Mailing_lists/Administration#Spam.21 - Reply THERE please!
I've detailed my daily process at another new section just below that. If there's something better, please let us know, there!
... (Probably nothing private in here, but I haven't had enough coffee yet, so instead of asking at the talkpage...)
I just learned about the option to Not send me a copy of every bounce. So that will be nice! (bottom radio-button in this screenshot: http://i.imgur.com/hu5SR8h.png) Is that a good setting to recommend to all admins on the wiki page?
Is there a way to get useful regex out of our current lists of "auto-discard"? (my grep-fu and regex-fu are lacking). Here are the addresses that I've moderated spam from, on 2 lists: https://dpaste.de/CgxV/raw
Perhaps the mailinglists that get large quantities of spam, could somehow share (automatically, or manually a few times a year) their auto-discard-listings?
Hope that helps. /me goes back to his weekend, and wishes you a good one.