Package: exim4-config Version: 4.93~RC7-1 Users are now seeing this problem as mentioned in https://lists.exim.org/lurker/message/20180602.193522.d632778a.en.html
> /var/log/exim4/mainlog has 166 of it's 305 lines occupied with: > > Warning: No server certificate defined; will use a selfsigned one. > Suggested action: either install a certificate or change tls_advertise_hosts > option In /usr/share/doc/exim4-config/ please add instructions on what users should do about it.

