Re: "Domain of sender address does not resolve" in mail logs
> Quoth Bob Cox at 2009-03-18 18:39...
> ...
> >The question is whether you should be rejecting email from any user
> >@act.gov.au just because act.gov.au does not resolve.
On 18.03.09 19:31, Matthew Smith wrote:
> Tempting though it is, rejecting mail on the basis of RFC-non compliance
> is NOT a good move. E-mail is borked beyond redemption so, until we
> are redeemed by the secure, efficient, replacement for SMTP, we need to
> be tolerant of such things as MX records not having corresponding A
> records - even though it makes our spam-filtering configuration that
> much harder.
If a domain doesn't resolve, it's not available for e-mailing, thus it
should not be used in mail addresses (you can't mail there, you can't bounce
there...).
Rejecting mail from non-existing domains has been good and very often used
anti-spam practive for YEARS, why do you oppose now?
However, the error was just temporary, so if destination mail server will
found the MX/A, it may accept the mail in the future (until the mail
expires). It seemed that act.gov.au should take care of its DNS...
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