Great app! It has a permanent spot on my Android phone. I am not sure if this belongs under discussion, but I'd like to recommend:

• I use Gmail which allows multiple accounts. This means when I receive mail which was originally sent to a different account, then when I reply, I would like the app to automatically recognize that the sending account should be different. Ideally, I should be able to send up a different smtp server for each different sending account, so I might have only one inbound imap server, but several outbound smtp servers.
• Gmail introduced nested labels. The current folder logic doesn't seem to recognize the nested labels. For example, I have a label Confirm, but then nested labels Confirm/Internet and Confirm/Purchase. I don't seem to have a way to get to these nested labels, only the highest level label "Confirm".
• New icon. My wife has a real phobia against insects and spiders. I would like her to be able to use this app on her phone, too.
• Pay app. Hopefully at a reasonable price, you'll find a lot of people preferring a no-ads version.

Thanks for a great app! This app already deserves 5 stars, but if I can get the above, I will be able to use it for all my needs.