Hello @Niklas ,
functionality works as expected, however following Werk #16043 the IMAP call now deletes all emails from INBOX. Reproduced with on-prem MS Exchange and HCL Domino mailboxes (so completely different vendors and IMAP server implementations).
This should be checked as I don’t think this is the expected behavior - otherwise there would be no point in the custom mail subjects created by the loop check if you delete everything anyway on every check interval.