I have a google spreadsheet that contains a list of email addresses. It's a contact list of sorts. I would like to have a function that opens a gmail new mail message window with these adresses (or some sub-set of them) so I can then complete the email and send.
The Sending Email tutorial on Google Developers shows you how to create and send emails directly, but not how open gmail ready for further editing.
Having looked at the reference for MailApp it seems that I can only use it to send completed emails, while GMailApp seems to allow me to access existing gmail messages.
Is there a way I can start gmail with a new message window without sending it?