Can't edit email saved in draft or figure out how to send it from there

I wrote up an email yesterday and saved it in the drafts folder since I didn't want it to go out until today. When I go in to drafts in Mail I can see the message as I left it but I can't figure out how to send it from there. I also tried to make a quick change and it wouldn't let me do that either. There is a jpeg attachment in the email but I don't see why that would prevent me from editing the message. Any help would be appreciated.