RE: Sendmail not able to send to external addresses.

[Jason Dixon <jason dixongroup net>]

On Thu, 2003-07-31 at 15:47, Cleveland mail winnefox org wrote:
> > Based on the status entry... it looks like sendmail attempted 
> > to connect to 4clevelands.com, but for some reason the 
> > connection was refused. Duh! This could either be a firewall 
> > blocking outbound connections on port 25 -or- sendmail is 
> > announcing itself (HELO) incorrectly to 4clevelands.com and 
> > is being rejected. I know I have my MTA confgured to reject 
> > MTA's that do not announce themselves correctly during the 
> > HELO handshake. Fricken spammers do that all the time.
> 
> How do I make sure it's announcing itself correctly?

You didn't answer my last question, so I did a little investigation of
my own.  Fortunately (for me), your DNS provider is allowing zone
transfers to outside parties (BAD!).  An axfr of winnefox.org shows 2
mail servers, "mail" and "storm".  A quick check of storm's IP shows no
PTR in place.  Fix that and your problems disappear.  :)

-- 
Jason Dixon, RHCE
DixonGroup Consulting
http://www.dixongroup.net