trying to figure out why mail is bouncing

[Bruce Dawson]

On Fri, 2003-10-31 at 08:45, Kenneth E. Lussier wrote:
> On Fri, 2003-10-31 at 08:22, Joshua S. Freeman wrote:
> > alright, but why is it also bouncing when sent using my own smtp server
> > which, afaik, is not blacklisted anywhere...
> > > >    ----- The following addresses had permanent fatal errors -----
> > > > <deanna.jackson3 at verizon.net>
> > > >
> > > >    ----- Transcript of session follows -----
> > > > ... while talking to relay.verizon.net.:
> > > > >>> MAIL From:<jfreeman at threeofus.com> SIZE=456
> > > > <<< 550 You are not allowed to send mail:sc019.verizon.net
> > > > 554 <deanna.jackson3 at verizon.net>... Service unavailable
> > > > ----
> I just did an nslookup on the MX record for your domain, threeofus.com.
> I got the IP address of mail.threeofus.com. When I did a lookup on the
> IP address, I got an NXDOMAIN error. There is apparently no reversae
> lookup for your mail server. Some people configure their mail servers to
> only accept mail from servers that can be reversed. I recently had the
> same problem at work when our ISP mysteriously pointed reverse lookups
> to the wrong place. 

Bingo. The above will certainly trigger a lot of denials.

> This, plus optonline being a spammers haven may explain everything.

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