Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!ccu.umanitoba.ca!herald.usask.ca!alberta!ubc-cs!van-bc!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!hplabs!hpcc05!hpcc01!cricket From: cricket@hpcc01.HP.COM (Cricket Liu) Newsgroups: comp.sys.hp Subject: Re: problems with sendmail under HP-UX 7.0 Message-ID: <1670020@hpcc01.HP.COM> Date: 28 Jun 91 01:51:22 GMT References: <1991Jun27.140448.19324@csus.edu> Organization: an interesting juncture in his career Lines: 40 I am a novice Sys Admin with an old HP9000s300 running HP-UX 7.0 that has just been installed from scratch. Users can send mail to each other just fine, but when other hosts attempt to send mail they get errors like : ----- Transcript of session follows ----- While connected to foghorn.sfsu.edu [130.212.10.100] (tcp): >-> HELO foghorn <<< 553 foghorn I refuse to talk to myself 554 ... Service unavailable Lovely message, no? What it's trying to tell you is that foghorn received the mail, didn't recognize it as being addressed to a local recipient, and tried to forward it on. When it popped open its own SMTP port and realized its mistake (by noticing the hostname in the HELO), it shut down the connection to avoid a mail loop. I'm guessing that sendmail isn't canonicalizing "foghorn" to "foghorn.sfsu.edu" when it freezes the sendmail.cf. Is the host configured to use name service? If it weren't, that would do it. Check that /etc/resolv.conf reads something like: domain sfsu.edu nameserver 130.212.10.102 nameserver 130.212.15.230 Heck, it may be that the machine just booted at a time when no name servers were reachable, so the canonicalization step failed. In that case (name service is configured and working), just kill the sendmail daemon (/usr/lib/sendmail -bk), refreeze (/usr/lib/sendmail -bz), and restart it (/usr/lib/sendmail -bd -q30m, or some other queue interval). If that's not it, drop me a line. I'd be happy to help you out if I can. cricket hostmaster@hp.com