Main Settings / General Settings / Messaging & Notification / Teachers Messaging / Use specific sender email address per
Here, you define whether teachers can configure sender email.
Example
Setting -> Message Category, Teacher Specified Email
As shown in Figure 1&2 the Teacher can configure the sender email.
Figure 1
Figure 2
Setting -> Empty
The configuration no longer exists, and the sender’s email cannot be changed (Figure 3).
Figure 3