Simon Billis sent a missive on 2010-05-21: Just to correct something I wrote: > Susan Day sent a missive on 2010-05-21: > >> Here are what the logs have to say: >> >> @400000004bf6cfc4383bc65c delivery 6217: deferral: >> CNAME_lookup_failed_temporarily._(#4.4.3)/ @400000004bf6cfc4383c5eb4 >> status: local 0/10 remote 0/255 @400000004bf6d51e34d61d8c starting >> delivery 6218: msg 97881531 to remote suzieprogrammer at gmail.com >> @400000004bf6d51e34d6449c status: local 0/10 remote 1/255 >> @400000004bf6d51e37303e14 starting delivery 6219: msg 97881555 to >> remote suzieprogrammer at gmail.com @400000004bf6d51e373078ac status: >> local 0/10 remote 2/255 @400000004bf6d51e373143cc delivery 6218: >> deferral: CNAME_lookup_failed_temporarily._(#4.4.3)/ >> @400000004bf6d51e373241b4 status: local 0/10 remote 1/255 >> @400000004bf6d51e37807d0c delivery 6219: deferral: >> CNAME_lookup_failed_temporarily._(#4.4.3)/ @400000004bf6d51e3780bf74 >> status: local 0/10 remote 0/255 >> > > Extract from: http://nixforums.org/about25455-Help-Diagnosing- > CNAME_lookup_failed_temporar ily.html > > "The likely cause of this is qmail's inability to handle large DNS > packets. The most-recommended solution is to install dnscache (from > djbdns), which trims off some unnecessary data and usually makes these > packets small enough for qmail to handle. The more correct solution is > to apply the "oversize DNS packets" patch to qmail (see qmail.org). A > hackish-but-fast solution is to choose one of Earthlink's MXs, and put > it in your smtproutes file. Not good long-term, but it will get the > mail out of your queue while you work on a better solution." > > I wouldn't put earthlinks mx in your smtproutes but you could put in > you isp's if you wanted to as a quick and dirty fix. It's been a long day, I'd not do the smtproutes but instead patch qmail or install the djb dnscache - the issue is caused by large udp (I think) packets being returned by the dns to qmail. I think that you could also use a smart smtp host instead of sending the mail out directly (if you have access to an smtp host that is working). HTH Simon.