Install exim4 in common.yml
Exim is part of our normal setup, so it should be installed in common.yml. But some servers use postfix instead, so they should be excluded. I also need to check if any server should have exim but currently doesn't.
Exim is part of our normal setup, so it should be installed in common.yml. But some servers use postfix instead, so they should be excluded. I also need to check if any server should have exim but currently doesn't.