I think one of the issues here is that the centos upstream repos have not been 
updated to the latest code yet. That being said, I was wondering if anyone had 
written any installation notes for installing postfix 3.x from source on centos 
or red hat?


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On Jan 2, 2021, 3:35 PM, at 3:35 PM, Wietse Venema <wie...@porcupine.org> wrote:
>CRAIG WILSON:
>> Hi,
>> I have recently "yum upgrade" my Centos Linux 7 Server. I had a fully
>working Postfix 2.10 system prior to that.
>> My Postfix service won't start. This is the error:
>> Jan 01 20:36:02 pbx.myrevtel.com<http://pbx.myrevtel.com/>systemd[1]:
>Starting Postfix Mail Transport Agent...
>> Jan 01 20:36:02
>pbx.myrevtel.com<http://pbx.myrevtel.com/>aliasesdb[28441]:
>/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter:
>compatibility_level=2
>> Jan 01 20:36:02
>pbx.myrevtel.com<http://pbx.myrevtel.com/>aliasesdb[28441]:
>/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter:
>meta_directory=/etc/postfix
>> Jan 01 20:36:02
>pbx.myrevtel.com<http://pbx.myrevtel.com/>aliasesdb[28441]:
>/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter:
>shlib_directory=no
>> Jan 01 20:36:02
>pbx.myrevtel.com<http://pbx.myrevtel.com/>postfix[28445]:
>/usr/lib/postfix/postfix-script: line 74: cd: HOME not set
>> It appears related to the shlib_directory within the above
>postfix-script file.
>> However, apparently the shlib_directory variable is only available in
>version 3.0+
>> Could anyone advise please.
>
>Why did you "upgrade" from Postfix3 to Postfix2?
>
>You are now running Postfix2 binaries (no suppport for shlib_directory
>or meta_directory) with your Postfix3 configuration (that specifies
>shlib_directory and shlib_directory).
>
>> Just to add: If I execute postconf -d | grep shlib_directory - I
>> get shlib_directory = no on the previous version.
>
>That was a Postfix3 system, which supports shlib_directory and
>meta_directory.
>
>> However, on my upgraded version the shlib_directory = no is not
>> returned from the postconf -d command.
>
>Because that is Postfix2, which does not support shlib_directory
>or meta_directory.
>
>       Wietse

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