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From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02 Description of problem: After installing the sendmail 8.12.8 update, local mail on the system is bouncing. The bounced message indicates (reason: 553 5.5.4 <root@localhost.localdomain>... Real domain name required for sender address) (expanded from: root) Sample instance of a bounced mail from /var/log/maillog in "Additional Information" section. This system has always run with sendmail without customizations. Users use Netscape for email. Local mail is used by Logwatch. Version-Release number of selected component (if applicable): sendmail-8.12.8-1.80 How reproducible: Always Steps to Reproduce: 1.Run mail, or pine(using for test) 2.To: root (from root), Subj: Test, Body: Test 3.Send mail and exit pine 4.Re-enter pine Actual Results: Bounced mail present in inbox with reason error code & message as decribed before. Expected Results: Mail should have been delivered and not bounced back. Additional info: /var/log/maillog event sample: Mar 21 13:50:54 mthood sendmail[11383]: h2LIosB6011383: from=<root@localhost.localdomain>, size=281, class=0, nrcpts=1, msgid=<Pine.LNX.4.44.0303211350410.11382-100000@localhost.localdomain>, proto=ESMTP, relay=root@localhost Mar 21 13:50:54 mthood sendmail[11387]: h2LIosPe011387: ruleset=check_mail, arg1=<root@localhost.localdomain>, relay=localhost [127.0.0.1] (may be forged), reject=553 5.5.4 <root@localhost.localdomain>... Real domain name required for sender address Mar 21 13:50:54 mthood sendmail[11386]: h2LIosB6011383: to=<root@localhost.localdomain>, ctladdr=<root@localhost.localdomain> (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30275, relay=[127.0.0.1] [127.0.0.1], dsn=5.6.0, stat=Data format error Mar 21 13:50:54 mthood sendmail[11386]: h2LIosB6011383: h2LIosB5011386: DSN: Data format error Mar 21 13:50:54 mthood sendmail[11387]: h2LIosPe011387: from=<root@localhost.localdomain>, size=281, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1] (may be forged) Mar 21 13:50:54 mthood sendmail[11387]: h2LIosPf011387: from=<>, size=2314, class=0, nrcpts=1, msgid=<200303211850.h2LIosB5011386@localhost.localdomain>, proto=ESMTP, daemon=MTA, relay=localhost [127.0.0.1] (may be forged) Mar 21 13:50:54 mthood sendmail[11386]: h2LIosB5011386: to=<root@localhost.localdomain>, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31305, relay=[127.0.0.1], dsn=2.0.0, stat=Sent (h2LIosPf011387 Message accepted for delivery) Mar 21 13:50:54 mthood sendmail[11388]: h2LIosPf011387: to=<root@localhost.localdomain>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=32536, dsn=2.0.0, stat=Sent
You might want to fix /etc/hosts for this to work again. Seems to be a local configuration problem on your machine. greetings, Florian La Roche
There was no probelm with /etc/hosts. After extensive research at the sendmail.org web site, the only work around for the problem I could devise was to add FEATURE(`accept_unqualified_senders')dnl to sendmail.mc and then recompiling. This is not a clean solution but will do for the time being since I do not accept external LAN mail since sendmail is not fully configured. I have upgraded to RH Linux 9 with this same sendmail configuration. Final goal will be to configure sendmail to accept internal LAN mail only to keep security related data internally.