Article ID: 6394, created on Jun 3, 2009, last review on Aug 12, 2014

  • Applies to:
  • Plesk 9.2 for Linux/Unix

Symptoms

Messages that contain a string of more than 4096 characters cannot be delivered. The following error is shown in maillog:

/usr/local/psa/var/log/maillog
--->8---
May 22 16:43:42 server1 postfix/spawn[11899]: warning: command /usr/lib/plesk-9.0/postfix-queue killed by signal 11
May 22 16:43:42 server1 postfix/spawn[11901]: warning: command /usr/lib/plesk-9.0/postfix-queue exit status 255
---8<---


NOTE: binary file postfix-queue may be located in another directory on your server, for example in /usr/lib64/plesk-9.0. This is variable $PLESK_LIBEXEC_DIR, the value depends on your operating system and architecture. For details about the variable see this KB article: http://kb.sp.parallels.com/en/5794

Here is example of transcript of session:

Out: 220 ppp.full.hostname ESMTP Postfix (Ubuntu)
In:  EHLO smtp.test.host
Out: 250-ppp.full.hostname
Out: 250-PIPELINING
Out: 250-SIZE 51200000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-AUTH CRAM-MD5 LOGIN PLAIN DIGEST-MD5
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In:  MAIL FROM:<mail@ppp.full.hostname> SIZE=13675
Out: 250 2.1.0 Ok
In:  RCPT TO:<mail@recipient.hostname> ORCPT=rfc822;mail@recipient.hostname
Out: 250 2.1.5 Ok
In:  DATA
Out: 354 End data with <CR><LF>.<CR><LF>
Out: 451 4.3.0 Error: queue file write error
In:  QUIT
Out: 221 2.0.0 Bye

Resolution

The problem has been fixed in Parallels Panel since version 9.2.3. In order to resolve the problem it is recommended that you upgrade.

Additional information

[How to] How to define what MTA is used in Parallels Plesk Panel and how to switch from Qmail to Postfix and vice versa?
[Info] Would email messages be lost when switch from Qmail to Postfix and vice versa?


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