Would be great to be able to apply a colour to message through a set of rules.

Currently, when you import an account from iCloud the app navigates back to the inbox after each of them, creating a bunch of unnecessary work to import multiple accounts.

This effort could be reduced by returning to the “Pick an account to import” view after choosing an account to import (if any remain)

To increase/ decrease text size in mail when is open; go down or up through the mail when is open; back delete words with Option+Delete.
View mails and reply them using full screen landscape mode. Now this option waste 20% of the full width.

An option to have email ordered newest on bottom an oldest on top so I could always have new emails reachable with my finger on the bottom when using the device one-handed. For example when I want to apply right or left swipe actions.

An option to add 2 or more lines of text to email titles in the list. Just as what it is for preview lines of body text (up to 4)

For the more security conscious I think Tresorit and Sync.com would be a welcome addition to your cloud storage choices

By default, Airmail hides the system email folders. A switch to enable their visibility would be very useful. I'd like to move mails to the sent items folder of another account or similar. This would als allow for a powerful definition of custom actions.
This is especially useful for people attached to a company or government email which could be disabled every day. Moving out important emails is essential then. Adressing the standard folders of another account might help.

Would be great to have a larger 'compose email' button, and ideally at the bottom of the screen rather than the tiny button which is currently top right.

Stats about incoming mails, incoming spam, send Mails etc.

Label

Support for hardware keyboards to delete whole words or lines of text using the Option+Delete and Cmd+Delete functions when composing emails. The search function supports this, so maybe there’s some setting I’m missing or reason this can’t be done.

Know exactly when and by whom your messages are read. Integranted in app

Currently meeting invitations show an attached VCS or iCal file that can be viewed but the user can't accept the meeting invitation.

In apps like Spark or EasilyDo, the app gives accept/decline options and then adds the details to the iOS calendar.

Please add the ability to accept/decline meeting invitations as is present in other iOS mail apps.

I have latest Airmail on my iPhone X. I have only gmail account. Every time I launch Airmail I get multitude of account confirmation dialogs from Airmail...