On Jun 9,  3:27am, 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
} Subject: Re: bin/32888: send-pr
} Date: Wed, 22 Feb 2006 15:19:58 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.

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