Use sender's user name instead up just address

When I get a reminder or notice from a co-worker, their name appears as their email address, not their names. Not everyone's email address is related to the name they are known by, which can be confusing.

When I send a reminder or message, I use the @user.name, which makes sense, but what they see is my email address. Maybe this is a setting I can change myself, but I couldn't find it.