violates privacy and looses messages

This application is among the worst I have ever trusted my e-mail with.
• In oder to retrieve icons, this app contacts every single domain that you receive a message from, effectively acting as a proof of reception to the sender – and any adversary.
• Without warning or notification, passwords are stored in iCloud IN PLAIN.TEXT
• Seemingly “successful" account configuration results in invalid settings
• Message sending failures are not indicated to the user – think about urgent mails.
I can only strongly discourage anyone from using this application, or its mobile counterpart, which I have tested as well.

do_not_buy_this_app about Airmail - Lightning Fast Email, v2.6.1