Sendmail on a multihomed server...
Fred
puissante at lrc.puissante.com
Tue Jun 29 18:33:00 EDT 2004
Hello.
Have a question about Sendmail -- I want to change its default outgoing
IP address to a different one, i.e. bind it to a different address for
its outgoing connections. There does not seem to be an obvious way to do
this. Any clues?
I got hit with a subtle issue that made the server look like an open
relay, though technically it was not. It seems that when you use the
'relay_entire_domain' feature or macro, it chops one level off the
server's domain name. Thus, if your server is set up as "theworld.com",
it chops off "theworld" part, allowing your server to relay anything
comming from the com TLD! This will get you an immediate blacklisting by
AOL, and it's darn near impossible to get off that blacklist, though
they claim their server will "check every 24 hours." Meanwhile, our
clients who happen to be on AOL can't receive email from us.
So, all I need to do is tell Sendmail to use a different IP address for
its outgoing connections, but thus far all the obvious approaches have
failed. Outside of juggling IP orders on the NIC, is there a way to bind
Sendmail to a different outgoing IP address?
Thanks.
--
Fred -- fred at lrc.puissante.com -- place "[hey]" in your subject.
There are inflows and outflows -- and you're just a little node.
Know then, what transcendental sets have you.
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