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.
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.
Thanks...
typical syslog entry:
*Nov 13 20:21:19 email2 postfix/smtp[50936]: D63998D18BF:
to=<[EMAIL PROTECTED]>, relay=none, delay=81,
delays=0.02/0.02/81/0, dsn=4.4.3, status=deferred (Host or domain name
not found. Name service error for name=att.blackberry.net type=MX: Host
not found, try again)
*
