I have updated posted already
Workaround with new version of patch for fixing 'Unprocessed command' error.
Please try it and update this thread with results.
Problem still exists (Debian Etch, Plesk 9.3.0, Postfix 2.3.8-2):
Out: 220 www3........net ESMTP Postfix (Debian/GNU)
In: EHLO [10.157.209.211]
Out: 250-www3........net
Out: 250-PIPELINING
Out: 250-SIZE 30720000
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: STARTTLS
Out: 220 2.0.0 Ready to start TLS
In: EHLO [10.157.209.211]
Out: 250-www3.........net
Out: 250-PIPELINING
Out: 250-SIZE 30720000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-AUTH LOGIN CRAM-MD5 DIGEST-MD5 PLAIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: AUTH PLAIN AGluZm9AY29ja3RhaWxzdGFyLmRlAHJtNkh0cDQ5
Out: 235 2.0.0 Authentication successful
In: MAIL FROM:<
[email protected]>
Out: 250 2.1.0 Ok
In: RCPT TO:<
[email protected]>
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
Feb 12 18:39:58 www3 before-remote[24135]: errno: Broken pipe
Feb 12 18:39:58 www3 before-remote[24135]: System error: Broken pipe
Feb 12 18:39:58 www3 before-remote[24135]: Unable to write data to stream
Feb 12 18:39:58 www3 before-remote[24135]: Some error occured
Feb 12 18:39:58 www3 before-queue[24133]: errno: Connection reset by peer
Feb 12 18:39:58 www3 before-queue[24133]: System error: Connection reset by peer
Feb 12 18:39:58 www3 before-queue[24133]: Unable to write data to stream
Feb 12 18:39:58 www3 before-queue[24133]: Some error occured
Feb 12 18:39:58 www3 before-remote[24135]: errno: Broken pipe
Feb 12 18:39:58 www3 before-remote[24135]: System error: Broken pipe
Feb 12 18:39:58 www3 before-remote[24135]: Unable to write data to stream
Feb 12 18:39:58 www3 before-remote[24135]: Some error occured
Feb 12 18:39:58 www3 postfix/spawn[24134]: warning: command /usr/lib/plesk-9.0/postfix-queue exit status 255
Feb 12 18:39:58 www3 before-queue[24133]: errno: Connection reset by peer
Feb 12 18:39:58 www3 before-queue[24133]: System error: Connection reset by peer
Feb 12 18:39:58 www3 before-queue[24133]: Unable to write data to stream
Feb 12 18:39:58 www3 before-queue[24133]: Some error occured
Feb 12 18:39:58 www3 postfix/spawn[24132]: warning: command /usr/lib/plesk-9.0/postfix-queue exit status 255
It's an absolute annoying situation!
Please bring up a WORKING SOLUTION - not a Workaround over a Workaround!
Thank You.