#+END_SRC
+Here is an example for sending e-mail via gmail:
+
+#+BEGIN_SRC emacs-lisp :tangle no
+ (setq
+ send-mail-function 'smtpmail-send-it
+ message-send-mail-function 'smtpmail-send-it
+ user-mail-address "fooNOSPAMgmail.com"
+ smtpmail-starttls-credentials '(("smtp.gmail.com" "587" nil nil))
+ smtpmail-auth-credentials (expand-file-name "~/.authinfo.gpg")
+ smtpmail-default-smtp-server "smtp.gmail.com"
+ smtpmail-smtp-server "smtp.gmail.com"
+ smtpmail-smtp-service 587
+ smtpmail-debug-info t
+ starttls-extra-arguments nil
+ starttls-gnutls-program "/opt/local/bin/gnutls-cli"
+ starttls-extra-arguments nil
+ starttls-use-gnutls t
+ )
+ (load-library "smtpmail")
+
+#+END_SRC
+
If you want to use POP to receive e-mail messages, the followings are
necessary.