URL to compose a message in Gmail (with full Gmail interface and specified to, bcc, subject, etc.)

This seems to work (for now):

https://mail.google.com/mail/?view=cm&fs=1&[email protected]&su=SUBJECT&body=BODY&[email protected]

Bookmarking this URL should give you a full-screen compose window, without any distractions:

https://mail.google.com/mail/?view=cm&fs=1&tf=1

Additionally, if you want to be future-proof (see for instance how other URLs in this question stopped working) you can bookmark a link to:

mailto:

It will open your default email client and you probably already have Gmail configured for that purpose.

https://mail.google.com/mail/u/0/x/?&v=b&eot=1&pv=tl&cs=b

This link works for composing directly in m.gmail.com as mobile in a desktop browser. Why? It is really faster.