Latest version removes mails from server (IMAP). No matter if I read the message or not - the mail is removed right after AquaMail read (synchronize) mails. A mail is not moved to a trash but "indicated removed" which prevents other clients to read this mail. Have this with many accounts including GMail
So, if you receive a message in your device, you cannot receive with different one?
I have my IMAP account but the message is readable in all devices, PC included...
Maybe there is a setting to flag...