IMAP email node - multiple triggers for same email


Please could someone tell me the correct setup for the Imap email node? I have the node working but during testing, the node is triggering multiple times when a single email was received in the watched email folder.

I have actions set to ‘nothing’ so I guess I may need to set to ‘mark as read’ to prevent further triggers.

I am using office 365, and have an app-specific password.

Thank you,