The first thing I’d do is look at the outgoing mail logs. If it’s bouncing 1/3rd of your users, it’s very likely it’s one or two whole domains that are bouncing, probably because your IP has been black listed or you don’t have DKIM set up right or something like that. The outgoing mail logs might tell you that. Also, don’t you get a copy of the “disabling bounce”? I always get one of that when somebody gets bounced off the list. The bounce message itself usually gives you a clue as well - I think it’s in an attachment called email.eml or something like that.
On Thu, May 7, 2026, at 10:39 AM, Stephen Daniel wrote: > Colleagues -- > > I run a small mailman3 server with perhaps 10 lists. All the lists are > small. > > Over the past two days about a third of the users in my most active list > have been disabled by bounces. I assume the problem is with my setup, not > with all of those users. > > How do I debug this? Can I see the text of any of the bounce messages to > understand why the emails bounced? > > This issue might stem from my running somewhat old software. Currently > running mailman 3.3.5. > > Thanks! > > -- Stephen Daniel > _______________________________________________ > 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/F4GUIWJWZYENX2R5G6WIDZLOGR6BOWQG/ > > This message sent to [email protected] -- Paul Tomblin _______________________________________________ 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/RR3TXJOZ42VK3Q3RJYNNPC4KGZ7AAPCX/ This message sent to [email protected]
