All commands for posting and mailing will put you in a message buffer where you can edit the article all you like, before you send the article by pressing C-c C-c. See Overview in Message Manual. Where the message will be posted/mailed to depends on your setup (see Posting Server).
|• Mail:||Mailing and replying.|
|• Posting Server:||What server should you post and mail via?|
|• POP before SMTP:||You cannot send a mail unless you read a mail.|
|• Mail and Post:||Mailing and posting at the same time.|
|• Archived Messages:||Where Gnus stores the messages you’ve sent.|
|• Posting Styles:||An easier way to specify who you are.|
|• Drafts:||Postponing messages and rejected messages.|
|• Rejected Articles:||What happens if the server doesn’t like your article?|
|• Signing and encrypting:||How to compose secure messages.|
Also see Canceling and Superseding for information on how to remove articles you shouldn’t have posted.