misssing some important features

tl;dr: nice UI, missing selective sync and bad crypto support

Fist of all the UI/UX is really good. All the Snooze, Reminder and Todo features are really good. Integration with Calendars is also really cool.
But then there is some important stuff missing like: I can’t selectivly sync folders on IMAP. I don’t nedd GBs of archived mailes offline available. Yes I can set a date limite for the age of the messages but that is not the same.

And then there is mail crypto there is no build in support. There are two plugins available for SMIME and GPG. You can manually install them but they seem totally unmaintained. There haven’t been updates for years and they have bugs. If you use GPG and SMIME together they will go crazy. They do not honnor settings and flip the Sign/Encrypt buttons on random bases. No matter what you have selected. You add a new recipiant and it flips them again. Super annoying. It somethime also failes to encrypt mails with no reasonable error message. And even worst it will then retry an send the mail as plaintext.

Kolja Dummann about Airmail - Lightning Fast Email, v2.6.1