I wrote a while back that I was having difficulty getting SMTP-AUTH running on a BSD box, and could not get it to work correctly. I happy to report that I have located the problem, and thought I'd post the solution in case anyone else runs into this. My configuration on one box worked fine, yet the second one wouldn't. The problem turned out to be nothing to do with the box at all, but the firewall. The server that worked is sitting behind IPCop, and the one that wouldn't is behind a pix box. Apparently Cisco has a "smtp fix-up" that mangles EHLO (http://tinyurl.com/nnovb). Once this "feature" was deactivated, everything worked just fine. I didn't catch this first time around because I didn't have the log options for sendmail set high enough to show the mangled EHLO command.

Greg Groth

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