Update happened around 5 hours ago here. Exim didn’t restart with error:
Jul 12 05:35:44 node.akcp.com exim4[802690]: 2023-07-12 05:35:44 Exim configuration error in line 306 of /var/lib/exim4/config.autogenerated.tmp:
Jul 12 05:35:44 node.akcp.com exim4[802690]: authenticator inbound_srs: cannot find authenticator driver "redirect"
Jul 12 05:35:44 node.akcp.com exim4[802692]: Invalid new configfile /var/lib/exim4/config.autogenerated.tmp, not installing
Jul 12 05:35:44 node.akcp.com exim4[802692]: /var/lib/exim4/config.autogenerated.tmp to /var/lib/exim4/config.autogenerated
Jul 12 05:35:44 node.akcp.com systemd[1]: exim4.service: Control process exited, code=exited, status=1/FAILURE
Jul 12 05:35:44 node.akcp.com systemd[1]: exim4.service: Failed with result 'exit-code'.
Jul 12 05:35:44 node.akcp.com systemd[1]: Failed to start LSB: exim Mail Transport Agent.
At first glance it seems that the srs lines have been inserted in the wrong place in the config.
Fixed with
cd /etc/exim4
cp exim4.conf.template.orig exim4.conf.template
And then restart exim.
Will investigate further. Have a few more servers to check right now.