sendmail masquerading question
Bill McGonigle
bill at bfccomputing.com
Sun Sep 16 16:00:31 EDT 2007
On Sep 13, 2007, at 16:40, Ben Scott wrote:
> So that may not be doing what you want, because it leaves $w
> set to whatever it used to be set to, and you seem to be implying your
> system's hostname is somehow bogus for purposes of Sendmail.
Right, in this case Sendmail needs to HELO with a valid hostname to
get past my spamtrap (aside: not revealing your internal hostnames is
probably a worthy goal, spam not considered). Ideally, the
masquerading stuff would do this at a certain level
(masquerade_envelope, perhaps?), but for now anyway you have to
convince it that its FQDN is different to get the desired behavior.
Postfix used to make you set 'myhostname=' just like sendmail does
with Dj, but now offers 'smtp_helo_name=' to make the specific HELO/
EHLO case available without overriding the FQDN for other cases.
It's a common enough problem with NAT, so maybe sendmail has such an
option I just didn't find.
http://www.postfix.org/postconf.5.html#smtp_helo_name
-Bill
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