How can I make a backup of my mail accounts?
Please use the Menu on the app’s main window and choose “Backup and Restore”. You can back up your account and folder settings, and optionally include the app’s settings.
The backup file is encrypted with a password (of your choosing) which will be required to restore.
The app lets you easily upload / download the backup file to / from cloud based storage (Google Drive, OneDrive, Box.com, Dropbox) and then restore from there. Or you can copy the file yourself, it’s under “backup/AquaMail” on the phone’s “large built-in storage”.
Please note that actual messages are not archived or restored. The app will re-sync them from the mail server(s).
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Since app version 1.17, "backup and restore" is in app settings -> Storage.