J. Echter:
> Hi,
>
> my harddisk run out of space and now i have a few messages in queue with
> that error:
>
> status=deferred (unknown mail transport error)
When Postfix does not receive or deliver mail, the first order of business is
to look for errors that prevent Postfix from working properly:
% egrep '(warning|error|fatal|panic):' /some/log/file | more
Note: the most important message is near the BEGINNING of the output. Error
messages that come later are less useful.
See http://www.postfix.org/DEBUG_README.html
Wietse