Missive’s email mentions feature allows you to quickly add recipients to the To, CC, or BCC fields by mentioning them in the body of an email. You can tag someone from your contact book or a known address using the @ symbol followed by their first name, last name, or email address.
NOTE By default, mentions are added to the To field. However, you can change this behavior via the settings: Settings > Preferences > Composer > Typing so that mentions are added to the CC or BCC fields instead.
Can email mentions be disabled?
Email mentions are suggested by default. However, they can be disabled via the settings: Settings > Preferences > Composer > Typing.