This is rather a simplistic answer and may not be the one you're looking for, but here it is. When typing in an address during the "Mail From" part of the SMTP session, sendmail doesn't care about the address unless it's version 8.9 or later and you're using an unresolvable domain...
Having resolv.conf doesn't mean you have DNS configured/running locally on your sendmail box. It's just a flat file to define the search order for which DNS box to use. If you do an nslookup, you'll see the server that comes up for resolving addresses. Try 'telnet {exchange server box} 25' to...
Gregga -
Can you provide a few more details? With an error like name server time out, it sounds like your sendmail server is timing out with DNS. Do you have DNS configured on the same box as sendmail or is that a different server (/etc/resolv.conf)? You could try some different rule...
ForumKid -
Sendmail is platform independent for the most part. You can bring down the latest version from ftp://ftp.sendmail.org/pub/sendmail/. Go through the README and INSTALL documents (as per normal). Sendmail should detect your OS during compile. You don't need to remove and part of...
NEVER EVER use linuxconf to make a sendmail.cf file. There is a known bug in linuxconf. If you stick to the standard m4 utility to make your cf's, you'll be certain to succeed.
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