On 13 February 2017 at 15:45, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: > > There are likely more Exim servers than Postfix servers. Exim is the default > MTA for Debian and Ubuntu Linux > ..
Not for Ubuntu: 'Postfix is the default Mail Transfer Agent (MTA) in Ubuntu' - https://help.ubuntu.com/lts/serverguide/postfix.html. However it seems you are right for Debian: 'Installing and Configuring Postfix on Debian: Install postfix (this will remove exim since there can't be two mail systems)' - https://wiki.debian.org/Postfix