On Jun 10,  7:07pm, i18rabbit@cwazy.co.uk wrote:
}
} The following reply was made to PR bin/32888; it has been noted by GNATS.
} 
} From: i18rabbit@cwazy.co.uk
} To: gnats-bugs@netbsd.org
} Cc: 
} Subject: Re: bin/32888: send-pr
} Date: Fri, 24 Feb 2006 06:57:57 GMT
} 
}  >  }  it appears that gnats.netbsd.org rejects
}  >  }  mail sent from NetBSD machines behind a
}  >  }  proxy server (FreeBSD using ppp NAT).
}  >  }
}  >  }  gnats.netbsd.org doesn't accept the email
}  >  }  because it can't lookup the local domain
}  >  }  behind the proxy - but netbsd.org doesn't
}  >  }  mind.  eg, if the proxy server is
}  >  }  abc.mytelco.org, and i email from
}  >  }  localmachine.abc.mytelco.org, it
}  >  }  will bounce from gnats.netbsd.org
}  >  }  because it can't do a reverse DNS
}  >  }  lookup on that domain.  netbsd.org
}  >  }  doesn't complain.  i don't think it
}  >  }  is a local configuration problem, but
}  >  }  more due to the fact that my ISP doesn't
}  >  }  pass DNS requests down to my server.
}  > 
}  >  It sounds like you are saying that you are sending mail out with a
}  >  return address of a.x.y.z, where x.y.z exists in the public DNS, but
}  >  a.x.y.z does not.  If so, then this is indeed a local configuration
}  >  problem as you are sending e-mail out with an invalid return address.
}  >  Look up masquerade in /usr/share/sendmail/README.
}  
}  the first part of what you say is true, i am emailing
}  from a host on a local network behind NAT stuff.

     The message will appear to come from the "NAT stuff".

}  but i am not sending out email with an invalid return
}  address.  if i was, how would i be getting this email?
}  
}  all my local DNS works fine, and if it received a query
}  for local machines behind the NAT server, it would
}  respond correctly, but ISP's don't pass those queries
}  down to their static IP customers typically.

     This really doesn't matter and it happens all the time.

     Do you have a sample of a message that bounced complete with all
the headers?  This would greatly help in figuring out what is going
on.

}-- End of excerpt from i18rabbit@cwazy.co.uk