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Mail delivery fails sometimes (read time limit exceeded)

prodigy7

New Pleskian
OS: Ubuntu 10.04.4 LTS
Plesk Panel Version: 10.4.4 Update #57

Last time we notice that mails are not delivered on our server. In the log files we found entrys like that:
Code:
Jan 17 12:30:45 hxxxxxxx postfix/pipe[588]: warning: pipe_command_read: read time limit exceeded
Jan 17 12:30:46 hxxxxxxx postfix/pipe[588]: 5894EC0CE09: to=<[email protected]>, relay=plesk_virtual, delay=1002, delays=0.95/0.05/0/1001, dsn=5.3.0, status=bounced (Command time limit exceeded: "/usr/lib/plesk-9.0/postfix-local")
Non delivery message, which senders receives:
Code:
From: "Mail Delivery System" <[email protected]>
To: <[email protected]>
Sent: Thursday, January 16, 2014 10:49 AM
Subject: Undelivered Mail Returned to Sender


> This is the mail system at host hxxxxxxx.xxxxx.xx.
>
> I'm sorry to have to inform you that your message could not
> be delivered to one or more recipients. It's attached below.
>
> For further assistance, please send mail to postmaster.
>
> If you do so, please include this problem report. You can
> delete your own text from the attached returned message.
>
>                   The mail system
>
> <[email protected]>: Command time limit exceeded:
>    "/usr/lib/plesk-9.0/postfix-local"
>
At moment we know no way, how the problem can be not reproduced.

Currently we've no idea, whats wrong. Google, this forum, many logfiles ... nowhere really a hint... because plesk files are binarys, we can't really debug what happens so we hope, someone here can give us the right hint.

Thank you!
 
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