This app was mentioned in 2 comments, with an average of 2.50 upvotes
Simplest way is using a plugin...i use this one:
https://play.google.com/store/apps/details?id=com.pclsoft.taskeremailsender&hl=en
What ones have you used and what problems are you encountering?
Aqua mail is free, although it's a full feature client. I bought this one a while ago.