Plesk Queue File Write Error

Posted: 1p in Plesk

PostFix error: Plesk Queue File Write Error

If you are running Plesk 9 on Linux server and receiving the emails error on recipient mail server say for example as follows.
Error::
Out: 220 Recipient server’s HostName ESMTP Postfix
In: EHLO Senders MTA’s/ Sender server’ HostName
Out: 250-Recipient server’s HostName
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-AUTH LOGIN CRAM-MD5 DIGEST-MD5 PLAIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: MAIL FROM: SIZE=26820
Out: 250 2.1.0 Ok
In: RCPT TO:
Out: 250 2.1.5 Ok
In: DATA
Out: 354 End data with .
Out: 451 4.3.0 Error: queue file write error

Session aborted, reason: lost connection
Solution::

You can eliminate those email error messages and make your emails deliverable by changing the PostFix configuration file. Here are the steps.

1. Open the PostFix configuration file “/etc/postfix/master.cf” and search the line

smtp inet n – – – – smtpd -o smtpd_proxy_filter=127.0.0.1:10025
2. Change it to as follows.

smtp inet n – n – – smtpd
3. Restart the PostFix service.

/etc/init.d/postfix restart
This change will stops the error messages and allows those messages to be delivered.
Applying these changes in postfix configuration may breaks some features like spam filtering, but those who have disabled spam filtering and having any other email security can refer for this solution.

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