Re:Mailbox.org discovers unencrypted password transmission i...
by db48x on Sunday May 07, 2023 @03:04AM
(#35848699)
They probably are. If they connect via IMAP, they can use the IDLE and/or the NOTIFICATION command to get notifications of new messages arriving. This is generally as prompt as it gets; the server doesn’t wait much before sending the notifications.
I'm sure the third party you share your email just to get push notifications with isn't monitoring your mailbox to the second either...