[CentOS] Mail server with both postfix and sendmail installed, active MTA gets switched.
Lamar Owen
lowen at pari.edu
Sat Jan 5 21:15:35 UTC 2019
On 1/5/19 2:18 AM, Gordon Messmer wrote:
> On 1/4/19 8:29 PM, Lamar Owen wrote:
>> 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.
> Run "systemctl mask sendmail" as well. That should permanently
> disable the service.
Worthwhile thing to do; still curious about what caused it, but if this
will lock it out.....
>
>> 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.
> ...
> If the problem is a trigger on the sendmail package, it could run
> without any changes to the sendmail package itself.
Ah, yes, indeed. Only three packages are output: sendmail itself,
postfix, and the third party software; postfix did get an update
recently, and after checking to see I didn't reboot after that update.
And the postfix scriptlets do twiddle with alternatives, using the
--initscripts command to alternatives; and this is what I believe did me in.
So, it seems as part of my setup that I failed to set the alternatives
properly, and that has been corrected, as well as setting 'systemctl
mask sendmail' so we'll see how that rides...
Thanks, Gordon!
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