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List:       rfci-discuss
Subject:    Re: [RFCI-Discuss] Abuse and postmaster mailboxes
From:       Matus UHLAR - fantomas <uhlar () fantomas ! sk>
Date:       2005-07-07 16:04:52
Message-ID: 20050707160452.GN30817 () fantomas ! sk
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> >Actually, RFC2821 only denies rejecting connection because hostname
> >provided doesn't resolve to the connecting IP. RFC2821 does NOT disable
> >rejecting connection because the hostname doesn't resolve at all (it's
> >not in DNS). I think you may refuse connection because the provided
> >hostname doesn't exist.

On 03.07 09:45, Keith Moore wrote:
> RFC2821 doesn't forbid you to reject mail based on the phase of the moon 
> either, but that doesn't mean it's a good idea to do so.

of course there are good ideas and bad ideas. You don't need to point out to
this.

> DNS misconfigurations and glitches are common enough that a hostname 
> lookup failure should not be taken as a reliable indication of spam.

incompetent DNS admins are good indication of possible problems, not only
spam. It is very good idea to reject connections from machines not having
correct DNS entries.
-- 
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Eagles may soar, but weasels don't get sucked into jet engines. 
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