在~/.gnus中作如下设置：
(setq user-full-name "yefeiyu")
(setq user-mail-address "yefeiyu@gmail.com")


;;;;;;;;;;;;;;;;;;;;
;;自动显示图片
;;;;;;;;;;;;;;;;;;;;
(auto-image-file-mode)
(setq mm-inline-large-images t)
(add-to-list 'mm-attachment-override-types "image/*")

(setq gnus-select-method
'(nnimap "gmail"
(nnimap-address "imap.gmail.com")
(nnimap-server-port 993)
(nnimap-stream ssl)))

(setq message-send-mail-function 'smtpmail-send-it
smtpmail-starttls-credentials '(("smtp.gmail.com" 587 nil nil))
smtpmail-auth-credentials '(("smtp.gmail.com" 587
"csfreebird@gmail.com" nil))
smtpmail-default-smtp-server "smtp.gmail.com"
smtpmail-smtp-server "smtp.gmail.com"
smtpmail-smtp-service 587
gnus-ignored-newsgroups "^to\\.\\|^[0-9. ]+\\( \\|$\\)\\|^[\"]\"[#'()]")

;; send mail
(setq
send-mail-function 'smtpmail-send-it
message-send-mail-function 'smtpmail-send-it
user-mail-address "yefeiyu@gmail.com"
smtpmail-starttls-credentials '(("smtp.gmail.com" "587" nil nil))
smtpmail-auth-credentials (expand-file-name "~/.authinfo")
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 "/usr/bin/gnutls-cli"
starttls-extra-arguments nil
starttls-use-gnutls t
)