Russell Yanofsky:
> The attached patch fixes the problem for me. It changes the relevant
> smtpd_resolve_addr() call in smtpd_check.c to use the message sender.
One complication is that the smtpd_resolve_addr cache is not only
used for validating recipients, but also for validating senders.
See check_sender_rcpt_maps(), which is used by reject_unlisted_sender
and smtpd_reject_unlisted_sender.
It don't know if your patch also makes that case work better, but
I suppose it is sufficient if it does not make things worse.
Always indexing the "resolve address" cache by sender+recipient
makes the cache less effective for everyone, and I expect that
almost no-one uses sender-dependent routing. So I may prefer to
make that part dependent on whether sender-dependent routing is
actually enabled.
I'm not fond of code that mallocs/copies/frees strings by hand,
because it is very easy to make a mistake. I think that you're
forgetting to free(sender) in resolve_pagein(), but such mistakes
are easily avoided by using higher-level primitives.
Wietse
