I'm building a mail platform using Dovecot/postfix/MySQL/iredmail/etc. The business end is on Ubuntu 13.04, the mailstore is an NFS share on Ubuntu 12.04.
Now when I try to send a mail to a new account, I get this in the postfix logs.
Aug 29 12:39:23 core-01-mail postfix/pipe: 5BEFF7A1: to=, relay=dovecot, delay=1009, delays=706/0.37/0/302, dsn=4.3.0, status=deferred (temporary failure)
However, if I tell it to use a local directory as a mailstore it works fine. So far it looks like my NFS share is busted, except....
If I then change it back to using the NFS mailstore, it continues to work fine. It's only the first mail that isn't working.
I've turned on full verbose debug logging for dovecot, but I'm not seeing any errors or warnings.
incidentally, here's my nfs mount
22.214.171.124:/voldata /data nfs nfsvers=3,hard,intr,auto 0 0