Last modified: 2014-08-31 04:41:57 UTC
SENDER_HEADERS = ('from',) in mm_cfg.py should help with fake emails from spammers, see https://bugs.launchpad.net/mailman/+bug/1154004 Will only be a problem (relative to current config) in the unlikely event that user subscribed with address A writes to the list from address A in Sender (e.g. webmail; or SMTP-AUTH) but specifying address B in From (e.g. misconfigured SMTP client).
Change 154846 had a related patch set uploaded by John F. Lewis: mailman: SENDER_HEADERS use from only https://gerrit.wikimedia.org/r/154846