Configuring <application>Mutt</application> Config files /etc/Muttrc, ~/.muttrc, /etc/mime.types, ~/.mime.types Configuration Information No changes in these files are necessary to begin using Mutt. When you are ready to make changes, the man page for muttrc is a good starting place. In order to utilize GnuPG, use the following command: cat /usr/share/doc/mutt/samples/gpg.rc >> ~/.muttrc