On 1/13/22 6:17 AM, Henrik Rasmussen wrote:
My problem, though, is that some subscribers may be disabled even they are able to receive mails (confirmed with sendmail -bv), and I have been looking at one subscriber in particular.
- Can there be (i'm not saying there are, maybe it's my lack of knowledge) somthing regarding Mailman?
- And what would the appropeiate per list bounce settings, if not default?
Referring to the example below, it seems that your Postfix delivers successfully to the first hop MX of the recipient, but the mail bounces further downstream resulting in an emailed bounce.
One thing you can do to help mitigate scoring of bounces of emails due to spam filtering is to set
[mta]
verp_probes: yes
This will cause Mailman to not disable delivery when bounce score reaches threshold, but rather send a probe which hopefully won't be detected as spam and only disable delivery if the probe bounces.
Actual example:
- Mailman sent seemly 6 mails to a member on January 6th.
- I see one bouce message D1426CE22A in Postfix log that was delivered back to Mailman
- I see that Mailman is counting the bounce score from 1 to 5, one at the time, but that was day after receiving the bounce, and no other mails have been sent to the user on the 7th nor received as bounce on the 7th. I suspect that it must have been in the Postfix queue until then, but I wonder why that could be - but could be.
- The bounce would be in the Postfix queue until sent to Mailman and thus removed from the Postfix queue.
I suspect the issue is something like a connection problem from the recipient MX to a relay MX that is not being reported as a bounce until the retry interval has expired.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan