Like BIS (my good old Blackberry ), I am in China, and be told the BIS service of China Mobile, they will store your email in the database, in plain text. I can't be sure if this is true, though I did not doubt too much. So, as a desktop app, if means "sign up" then will store my email contents on your server? and how about my emails' passwords?
I love the UI but the icons are ugly, I believe you will change them before long.
when I first time to input my gmail address it poped up some dialog warned me that my gmail account was not recognized(?), and suggested me to enable my gmail's IMAP option, of course it's already enabled for years. so I ignored that and entered my password and connected, it also lag a little while, then things went well.