hello, I see a problem. I need your support on this.
Problem: Any e-mail user provides e-mail sending after logging in through outlook. But when providing email sending, it can also send in the name of a different email user.
Example; firstname.lastname@example.org it is installed on outlook. Because the sender part can be changed in the Create new message section email@example.com he sends it as.
When I check the sent email source, the login user firstname.lastname@example.org but the sender’s name email@example.com.
How can we take action on this issue. How can I prevent this.
Because such problems are a problem between the lower user and the upper user dec
In short, e-mail users belonging to the same domain can send e-mail on behalf of another user, even if they don’t know their passwords.