Ok, so a bit of a long subject line there...
I'm running an email server using postfix, but a critical third-party
package being used requires 'sendmail' the package. No, I can't
uninstall that package, please don't suggest that, and I don't have
control of its requires. So both postfix and sendmail are installed,
and that's just the way it has to be. Amavisd-new and clamav/clamd,
from EPEL are also installed.
I have had updates twice now switch the active MTA to sendmail, and I
have to manually 'systemctl disable sendmail; systemctl stop sendmail'
and 'systemctl enable postfix;systemctl start postfix' afterwards. I am
trying to find out what package update caused this to switch; or which
logfile to look at to show me the systemctl messages that show the
enable/disable sequence and points me to the correct package to file the
bug against.
The packages updated today when this happened were:
# cat /var/log/yum.log
Jan 04 16:42:47 Updated: clamav-filesystem-0.101.0-1.el7.noarch
Jan 04 16:42:48 Updated: clamav-lib-0.101.0-1.el7.x86_64
Jan 04 16:42:48 Updated: clamav-update-0.101.0-1.el7.x86_64
Jan 04 16:42:48 Updated: clamd-0.101.0-1.el7.x86_64
Jan 04 16:42:48 Updated: clamav-server-systemd-0.101.0-1.el7.x86_64
Jan 04 16:42:48 Updated: clamav-scanner-systemd-0.101.0-1.el7.x86_64
Jan 04 16:42:49 Updated: clamav-0.101.0-1.el7.x86_64
Jan 04 16:42:54 Updated: clamav-data-0.101.0-1.el7.noarch
Jan 04 16:42:55 Updated: python2-certbot-apache-0.29.1-1.el7.noarch
#
Sendmail hasn't had updated packages in a long time, since August 2017.
None of the package scriptlets from the above packages look like they
would affect the sendmail setup. So, I'm looking for suggestions on
where to start looking for the data to ferret this out; no clues are in
/var/log/messages or /var/log/yum.log.
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