Description
This article describes that an external email sender can request a read-read receipt in an email, prompting the protected recipient's e-mail client to send a receipt or in the case of some mail clients send it automatically.
When sending back a read-receipt, as this is an SMTP communication, the external recipient can be added to a user safelist, if the resource profile option 'Safelist recipients of outbound message' is enabled.
Scope
FortiMail.
Solution
The sender's e-mail client inserts the header 'Disposition-Notification-To:' and based on this header the protected user's e-mail client will prompt for a read request or send it automatically.
It is possible to 'disarm' such read-receipt requests so that the protected user's e-mail client will not even know there was a request in the first place, and thus.
