Jeffrey Shawn Klotz <[EMAIL PROTECTED]> wrote: > I'm having DNS issues when delivering mail on a postfix server. > > The server seems to run fine for several hours. > After a while, emails start to stay in the queue with the following error > for all domains: > > postqueue -p > > *D63998D18BF 88122 Thu Nov 13 20:19:58 [EMAIL PROTECTED] > (Host or domain name not found. Name service error for > name=att.blackberry.net type=MX: Host not found, try again) > [EMAIL PROTECTED] > * > > If I flush the queue (postqueue -f) mail starts to flow again and continues > to clear the queue for several hours. > The server does not seem to have DNS issues with other applications. > NSLookup does not seem to have issues.
What if you nslookup as the postfix user? What are the contents of your /etc/resolv.conf? What about /etc/nsswitch.conf or /etc/hosts? See the FAQ for clues: http://www.postfix.org/faq.html#delay. > I don't think it's a postfix problem. Is there a way I can verify Postfix > is able to perform DNS lookups? Is there a way to log more detailed > information on the routing/delivery process. Isn't it performing DNS lookups just fine when delivering to other domains? Is this problem limited to att.blackberry.net or was that just one of many examples? Also see: http://www.postfix.org/DEBUG_README.html#mail. -- Sahil Tandon <[EMAIL PROTECTED]>
