This happens in corporate situations with firewalled networks a lot. I speak from unfortunate experience :)
> -----Original Message-----
> From: Sam [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 24, 1999 10:41 PM
> Cc: [EMAIL PROTECTED]
> Subject: Re: reverse DNS
>
>
> Michael Boyiazis writes:
>
> > I went through qmail-smtpd and added a bit of code to
> > do a gethostbyaddr.
>
> Why?
>
> Tcpserver already does it for you.
>
> > set to 'unknown'. Would it make sense to deny mail if
> > either of these is 'unknown'. and/or set tcpserver
> > option -p?
>
> My personal experience is that the likelyhood of a given mail server
> lacking a proper functioning forward and reverse IP address
> resolution is
> directly proportional to the likelyhood of you receiving
> nothing but spam
> or mailbombs from that server.
>
> Chances are that if someone's not smart enough to implement
> DNS properly,
> they're not smart enough to configure their mail server as
> well. YMMV.
>
> --
> Sam
>
>
