a few questions about the initial setup of gnus

[Martin]

1. what do I need to add to .emacs to send email from my gmail account.
At the moment, if I try to send something, it shouws my username and my
hostname in the From: field (instead of username and gmail.com
I've got my ~/.authinfo in place


that's the relevant bit of my .emacs


(setq gnus-select-method '(nntp "news.virginmedia.com"))
(setq gnus-secondary-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
"myusername@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")




2. How can I subscribe to particular groups?
3. Can I remove the line about local-domain?

thank you very much in advance

-- 
regards

Martin