Antivirus on fortigate block incoming email causes IMAP sync issues.

Good day,

FortiGate blocks suspected incoming email based on Antivirus security profile, the protocol of the email client (Outlook) is IMAP.

Which causes the sync with the mail server to be stuck and to solve this I have to delete this email and the sync would continue

I've disabled IMAP protocol scan in the antivirus profile, for now, to get it to sync with no issues, did anyone face a similar issue?

Thanks.