postfix/mail: server blacklisted -- what have I done wrong?
news at pointerstop.ca
Fri Mar 24 20:32:21 UTC 2006
Matt Price wrote:
>> IIf they're really blacklisting servers for sending mail from FQDNs that
>> aren't MXes they should be shot. There's no reason a _sending_ mail
>> address should be a valid MX. There's also no reason that it should have
>> 'proper' reverse DNS. My _proper_ domain, pointerstop.ca, is on a
>> service. A reverse lookup on the IP is always going to show
>> cedars.serverforest.com. There's nothing wrong with that, either in
>> practice or in the various mail RFCs.
> glad to hear that's ok, the stringent requirement proposed here &
> elsewhere seemed a little strong. In this particular case the error was
> the much more egregious localhost.localdomain one described above.
I didn't really mean to say it's "ok". Many of the "blackhole" services are
ridiculously stringent. They shouldn't be blacklisting someone just
because their IP doesn't reverse-DNS to their stated domain, but it
happens. They may be wrong, but it'll be your problem :-( As for sending
mail from an address that isn't an MX, I hadn't heard of that one - but it
makes no sense.
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