Ever since working with Debian I have wondered why more Linux distros don’t ship with exim on as the default mail client.
“exim -bt email@address” is reason enough
It is simpler to setup and easier to administer. If you want your fedora machine to send local email via Gmail, here is a guide.
One point to add, if you want root mail delivered somewhere, edit /etc/aliases and set an alias for root. Don’t forget to run “newaliases” when your done.