My default Mutt configuration to work with G Suite / Gmail.
You need to do first this steps:
$ mkdir -p ~/.mutt/cache/headers
$ mkdir -p ~/.mutt/cache/bodies
$ mkdir -p ~/.mutt/certificates
Change the default "user@domain.com" and "mypasswd" with your real settings in the file muttrc, move it to your $HOME directory, rename it from dot.muttrc to .muttrc and start the Mutt client.
Make the Mail Great Again!!!