let me explain my situation !
my zcs running on centos 5.3. it can receives email well but
when i send email to a user of yahoo (or gmail or ...). sometimes it's ok but i often have a error :
i'm sure that user is existing. i try to requeue it but it's doesnt work.host or domain name not found. name service error for name=yahoo.com type=mx: host not found, try again (1 messages)
and if i reboot centos , emails will go smoothly.
i checked logs ( zimbra.log and mailbox.log but it seems no error
pls give me some advice. i searched on forum and google but i found nothing !
thanks in advance!