Allan Odgaard wrote:
On 17 Jun 2008, at 18:53, Mark Sapiro wrote:
Brad Knowles wrote:
On 6/17/08, Allan Odgaard wrote:
I transferred a lot of list members from a previous list. A dozen of
these
has left errors like the following in `logs/smtp-failures`:
delivery to <<address>> failed with code 450:
4.1.2 <<address>>: Recipient address rejected:
Domain not found
You're doing DNS validation on your outbound
mail. Don't do that. Pay attention to the stuff
in section 6 of the FAQ, especially including
6.6, 6.8, 6.12, etc....
Also, fix your MTA configuration so it returns a 5xx status, not a 450
for a non-existant domain.
To the best of my knowledge, this can not be “fixed” (for Postfix). If
Postfix is unable to obtain DNS settings for a domain, it will treat it
as a temporary error, and will return 450, regardless of settings (and
to me this seems correct, as not being able to obtain DNS settings is
likely because something is down).
Unless you get an authoritative NXDOMAIN, in which case the domain does
not exist. Period.
If on the other hand it _does_ find a name server for the domain and
there is no MX record, _then_ can it be treated as a permanent error.
NOT TRUE. The RFC states that in the case of no MX record the domain
name itself should be treated as the only MX record.
If others should run into this problem `reject_unknown_recipient_domain`
was the setting I had to disable in Postfix’s
`smtpd_recipient_restrictions`.
Oh. Not normally a good idea, but in this case I'd agree. With exim I
simply accept everything being injected with the sendmail command (as
well as connecting from localhost but destined for a non-local domain),
which does something a little different from this, but works very well.
Jaco
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