at least exim4-config postinst creates /etc/mailname
https://wiki.debian.org/EtcMailName
so I don't think removing it on purge is right, as it doesn't care if another package would still need it
at least exim4-config postinst creates /etc/mailname
https:/ /wiki.debian. org/EtcMailName
so I don't think removing it on purge is right, as it doesn't care if another package would still need it