Paul Ssekamatte via Mailman-users writes: > 1. strangely so far i only see Yahoo domain in the spam > 2. I use Postfix as the MTA > 3. The MTA only relays for a specific list of senders > 4. It is a production mail server so we have most of those controls in place > i.e DKIM, SPF > 5. I have not identified any suspicious logins, the bad actors must be using > the subscription option on my mailing lists info page
OK, I would say the chances are that Mark is right. There is another channel that could cause the same effect, which is mail subscriptions to $LIST-join@$YOUR.DOMAIN (also $LIST-subscribe and $LIST-request variants on many systems). Steve -- GNU Mailman consultant (installation, migration, customization) Sirius Open Source https://www.siriusopensource.com/ Software systems consulting in Europe, North America, and Japan _______________________________________________ Mailman-users mailing list -- [email protected] To unsubscribe send an email to [email protected] https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/ Archived at: https://lists.mailman3.org/archives/list/[email protected]/message/S77U4QD5UPNGN7D23MUMFKZ63MZ5HZ36/ This message sent to [email protected]
