Mailman does see the failure. It is logged in Mailman's smtp-failure log
and depending on the situation may be recorded as a bounce for the user,
but in the case of a subscription confirmation request, the recipient
isn't yet a list member so a bounce can't be recorded.
The underlying issue is that the SMTP reject is of a message From
Mailman so it is Mailman that sees the reject. There's nothing Mailman
can do at this point to inform the user, since even if Mailman tried,
whatever Mailman tried to send to the user would also be rejected by the
MTA.
Since the original request comes from the web, there's not much you can
do. If you the blacklisted domains are a static list, you could add
^.*[@.]bad.domain.tld
for each domain to the list's ban_list.
Or, you could set up a separate SMTP submission port other than 25 in
your MTA for Mailman to use and not apply blacklisting to mail submitted
there.
** Changed in: mailman
Status: New => Invalid
--
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Coders, which is subscribed to GNU Mailman.
https://bugs.launchpad.net/bugs/1609713
Title:
SMTP sending errors are ignored
To manage notifications about this bug go to:
https://bugs.launchpad.net/mailman/+bug/1609713/+subscriptions
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