Description of problem:
I was intrigued to see no mail arriving, and found out sendmail wasn't resolving any mail origin. I checked that DNS is working, and tried several of the non-resolving domains with host(1), DNS answered OK. I'm relaying mail here via fetchmail-6.3.17-1.fc14.x86_64
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start sendmail
Mail bounces, in /var/log/maillog I get e.g.
Aug 19 17:29:44 laptop14 sendmail: o7JKEw1E022525: from=<firstname.lastname@example.org>, size=3928, class=0, nrcpts=0, bodytype=7BIT, proto=ESMTP, daemon=MTA, relay=laptop14.inf.utfsm.cl [127.0.0.1]
Aug 19 17:29:44 laptop14 sendmail: o7JKEw1F022525: ruleset=check_mail, arg1=<email@example.com>, relay=laptop14.inf.utfsm.cl [127.0.0.1], reject=451 4.1.8 Domain of sender address firstname.lastname@example.org does not resolve
Aug 19 17:29:44 laptop14 sendmail: o7JKEw1F022525: from=<email@example.com>, size=4938, class=0, nrcpts=0, bodytype=7BIT, proto=ESMTP, daemon=MTA, relay=laptop14.inf.utfsm.cl [127.0.0.1]
Going back to sendmail-8.14.4-10.fc15.x86_64 makes it work.
I am unable to reproduce this, sendmail-8.14.4-11.fc15.x86_64 in rawhide testing environment works OK for me. Please note there shouldn't be any change in functionality between release 10 and 11, please check: http://pkgs.fedoraproject.org/gitweb/?p=sendmail.git;a=commitdiff;h=c8ac1bc90081f1b70700b23ca708e2f69f2bfabb;hp=d89cc2df32c5164dec5a6e53d1016b716e249aad
Can you recheck and provide more details? Please note that I tested with selinux in permissive mode as there are still some bugs in selinux policy in rawhide preventing users from successfull log-in (also note if selinux is the core of your problem, it should be reported against selinux).
Very strange... I'm running with SELinux in enforcing mode without any particular trouble here (x86_64).
And you are right, nothing there should affect the workings in any way (modulo compiler/library differences).
OK, seems I found out what is going on: This &#@~$ kernel drops the WiFi network connection at random, and so obviously everything goes south.
I'm getting mail normally after getting the network going again.
Sorry for the noise.
[Please add PILOT ERROR ("I'M AN IDIOT" is too strong ;-) to Status]