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sendmail: stickyhost; @host.domain.com

Posted on 1997-11-28
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Last Modified: 2012-05-04
Hi. I have my DNS setup so that *.domain.name points to the same IP; am using sendmail 8.8.5 on a BSD/OS 3.0 system.

How do I setup sendmail.cf so that it does not "scrunch" user@host.domain.name to merely user@domain.name? I suppose it's FEATURE(stickyhost) in the .mc file but I can't simply generate a new sendmail.cf using m4 due to virtual server limitations.

Or perhaps, is there some rule that I should comment out or add so that user@host1.domain.name and user@host2.domain.name can point to different addresses (via virtmaps)?

Another way to state this would be, how do I get virtmaps to support @host.domain.name entries? I got it running fine for @domain.name entries.

Looking for rule(s), not m4 macros...

Thanks!
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Question by:dirge
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by:dirge
ID: 2008113
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dhughes111797 earned 150 total points
ID: 2008114
Try this:
look for rules that have something like this in
them:
R$+ @ $+ . $m    or
R$+ < @ $+ . $m >   or
R$+ < @ $* . $m >   or
R$+ < @ $- . $m >
comment them out, then put sendmail in test mode with this new config file and try it out. If it doesn't work, it might help if you post the current sendmail.cf file that you are using.
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by:dirge
ID: 2008115
Actually, I found out that it is impossible with my particular setup: the mail relays do the "scrunching", i.e. canonicalization. You get the points for your time though... :)

The possible solutions would be: to assign separate IP addresses to each host so that host.domain.name does not get canonicalized down to domain.name; and to scan the headers for the first/lowermost "Received:... for <user@host.domain.name>" line. Unfortunately, the latter is not a sure thing. Some relays don't add the "for" clause.
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