Fortimail Auth and access ip policy vs recipient policy

Hello,

I’m curious about the differences between Authentication and Access under IP Policy and Recipient Policy on FortiMail. When Authentication and Access is enabled under Recipient Policy, it ensures the necessary authentication when accessing emails in the personal quarantine. However, I don’t fully understand what it does under IP Policy. Has anyone used or inquired about this before?

And i know this " For webmail login, select an appropriate Authentication type and Authentication profile
under Authentication and Access when configuring an inbound recipient-based policy" , "

IP-based policy authentication does not support webmail login."

Thanks

• FortiMail