[BlueOnyx:24465] Re: 5210R Mailman

[Florian Arzberger]

I don’t know if it’s related, but when i try to access the mailman admin interface via the GUI button, i also get:

Mailman CGI error!!!

The Mailman CGI wrapper encountered a fatal error. This entry is being stored in your syslog:
Group mismatch error. Mailman expected the CGI wrapper script to be
executed as one of the following groups:
[httpd],
but the system's web server executed the CGI script as group: "apache".
Try tweaking the web server to run the script as one of these groups:
[httpd],
or re-run configure providing the command line option:
'--with-cgi-gid=apache'.

> Am 06.11.2020 um 20:35 schrieb Michael Stauber <mstauber at blueonyx.it>:
> 
> Hi Florian,
> 
>> Could this also somehow have to do with the switch from sendmail to postfix?
> 
> I just checked it (again) and it's true: As it is now Mailman doesn't
> work with Postfix on 5210R.
> 
> As it turns out: The guides to integrate Mailman into Postfix on RHEL 8
> or CentOS 8 are all utter and complete garbage. Mostly due to the fact
> how flexible Postfix is and that you can achieve the same net-results in
> many different fashions of configuration.
> 
> The probably most worthless guide was of course published by RedHat:
> https://access.redhat.com/solutions/36454
> 
> They say: "NOTICE: This article assumes that you have an
> already-configured and working postfix server."
> 
> In fact they tell you fuck all about how the Postfix side of things has
> to look in order for Postfix to be able to pass emails on to Mailman.
> Which is kinda ridiculous, as the default Postfix configuration in
> CentOS 8 has no Mailman related settings begin with. So this actually
> never makes ends meet.
> 
> I just figured out what's wrong and how to get it working.
> 
> Bottom line: This requires changes in both the Mailman and Postfix
> configuration. I need to move the location of the Mailman alias files
> from /etc/mail/aliases.mailman to /etc/mailman/aliases. In addition the
> Postfix parameter 'virtual_alias_maps' drops /etc/mail/aliases.mailman
> and instead gets 'hash:/etc/mailman/virtual-mailman' added.
> 
> So I'll have to wiggle this into the dynamic Postfix-Confgen routine as
> well as to make sure that all the config changes to Mailman are rolled
> back when someone switches from Postfix back to Sendmail.
> 
> As this is a bit complicated I'm not sure if I'll manage to roll up
> fixed RPMs today. But I guess until Monday at the latest I should have
> YUM updates ready.
> 
> -- 
> With best regards
> 
> Michael Stauber
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