The webmail version because literally nothing else works. Not mail spring. Not thunderbird. Not imap. Fucking shittiest email I've ever had the displeasure of using. And when you email from the web interface each email takes ten seconds to send. Garbage. I try to check and use it as few times as possible. Sometimes I forget. That's a productive day. Piece of shit. I can't believe they pay money for this garbage. It also doesn't work on other platforms like android or Mac. It used to. Not to mention it requires weak passwords since it botches the password change constantly.