postfix gives dsn=4.3.0, status=deferred (Internal mail system problems )

[chris@virtbiz]

Having problems with a Plesk 9.2 install using Postfix.

On some accounts, mail does not deliver, but instead logs something like:

Oct 9 01:36:56 servername postfix/pipe[24328]: 1F5B313103DC: to=<user@domain.tld>, relay=plesk_virtual, delay=0.04, delays=0/0/0/0.04, dsn=4.3.0, status=deferred (Internal mail system problems )

Any ideas as to what might be causing this? Postfix has much better logging than the horrible Qmail, but it's still not very helpful.

 

[Frankv]

We have the exact same problem after switching from qmail to postfix. Anyone have a solution?

 

[ThiagoL]

resolve?

hello!
good day, managed to solve the problem? has a solution? I am suffering with
that too.

Feb 23 08:55:58 plesk postfix/pipe[19124]: 9EF2013C28C: to=<xxxxxx@xxxxxx.xxx.xx>, relay=plesk_virtual, delay=372, delays=369/0.13/0/2.8, dsn=4.3.0, status=deferred (Internal mail system problems )