[Mimedefang] $RelayHostname not matching sendmail's Received header?
Joseph Brennan
brennan at columbia.edu
Mon Dec 4 09:09:01 EST 2006
--On Thursday, November 30, 2006 14:51 -0600 Michael Sims
<michaels at crye-leike.com> wrote:
> Received: from adsl86-34-215-137.romtelecom.net
> (adsl86-34-215-137.romtelecom.net [86.34.215.137] (may be forged)) by <my
> relay running MIMEDefang> ...
>
> However, inside my mimedefang-filter, the value of $RelayHostname was not
> "adsl86-34-215-137.romtelecom.net" as I expected, but rather it was
> "[86.34.215.137]", seemingly indicating that MIMEDefang was not able to
> determine the relay's hostname.
Sendmail wants forward and reverse to match. See "(may be forged)"?
This host has a PTR but no A (or at least not an A with this name). It
did say helo with the same name as given in the PTR record.
$ host 86.34.215.137
137.215.34.86.in-addr.arpa domain name pointer
adsl86-34-215-137.romtelecom.net.
$ host adsl86-34-215-137.romtelecom.net
Host adsl86-34-215-137.romtelecom.net not found: 3(NXDOMAIN)
Joseph Brennan
Lead Email Systems Engineer
Columbia University Information Technology
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