Gnus

Gnus is a program running in Emacs for reading and editing e-mails and Usernet News

==Using Gnus with Gmail

1. Make sure starttls package in installed on your system
2. Create a Gmail account
3. Enable IMAP in Gmail accout, by settings->forwarding POP/IMAP
4. Use Gmail’s IMAP as a (secondary) select method

(add-to-list 'gnus-secondary-select-methods '(nnimap "gmail"
                                  (nnimap-address "imap.gmail.com")
                                  (nnimap-server-port 993)
                                  (nnimap-stream ssl)))

or Using Gmail as primary select method

# Put following line  in your ~/.authinfo
machine imap.gmail.com login username@gmail.com password secret port 993
# Enable using gmail’s SMTP server by put following line in ./gnus.el
<source lang="lisp">
(setq message-send-mail-function 'smtpmail-send-it
      smtpmail-starttls-credentials '(("smtp.gmail.com" 587 nil nil))
      smtpmail-auth-credentials '(("smtp.gmail.com" 587 "username@gmail.com" nil))
      smtpmail-default-smtp-server "smtp.gmail.com"
      smtpmail-smtp-server "smtp.gmail.com"
      smtpmail-smtp-service 587
      smtpmail-local-domain "yourcompany.com")

For managing your address book, see Contact Management.