Dealing with SPAM e-mail is a real hassle. Dealing with SPAM e-mail as a mailing list owner is an even bigger hassle. Here are some tips for dealing with SPAM e-mail on mailing lists using the Mailman software package.
Unless you are making your users as well as yourself miserable, you’ve probably set the “Action to take for postings from non-members for which no explicit action is defined” to “Hold”. I believe this is the default setting for new lists.
This will hold all of the messages sent by non-members — all of those spamy e-mail addresses — to a queue on the Mailman server. You’ll receive a notification that a message is being held for you:
As list administrator, your authorization is requested for the following mailing list posting:
Reason: Post by non-member to a members-only list
At your convenience, visit:
to approve or deny the request.
You’ll also get a message once a day telling you that these messages are being held and insisting that you do something about it.
The mailingListName@mailingListHost mailing list has 3 request(s) waiting for your consideration at:
Please attend to this at your earliest convenience. This notice of pending requests, if any, will be sent out daily.
This isn’t an ideal solution, but it at least lets you ignore the vast majority of these messages confidently knowing that — unless your mailing list is unlucky enough to be hit daily by spam — eventually the daily prodding messages will go away. The key is to set the “Discard held messages older than this number of days” to some reasonable number:
I use “4” in that field: two days to cover weekends plus a two day grace period. For a message that is errantly caught in the queue (because it was too large, was sent by a subscriber who’s email address changed, or other reason), I now have four days to release it. If I do nothing, the message disappears from the hold queue after that time, and I get this final e-mail message:
Subject: mailingListName moderator request check result
Date: July 16, 2008 8:00:08 AM EDT
Notice: 1 old request(s) automatically expired.
Customize these instructions
The text was modified to update a link from http://dltj.org/article/mailman-spam-howtomailman-spam-howto/ to http://dltj.org/article/mailman-spam-howto/ on December 30th, 2010.(This post was updated on 30-Dec-2010.)