7.3.1 Connecting to an IMAP Server

Connecting to an IMAP can be very easy. Type B in the group buffer, or (if your primary interest is reading email), say something like:

(setq gnus-select-method
      '(nnimap "imap.gmail.com"))

You’ll be prompted for a user name and password. If you grow tired of that, then add the following to your ~/.authinfo file:

machine imap.gmail.com login <username> password <password> port imap

That should basically be it for most users.