I have a community site that sends emails after certain actions like

1) When someone makes a comment
2) When someone does something called "suggest solution"
3) When someone makes a comment in the suggested solution which is different from a regular comment.

What I am wondering is what is the best way to make the from field of the email appear?

Right now it is something like

1) [email protected]
2) [email protected]
3) [email protected]

But 2 and 3 look so strange when receiving the email. What is the nice and professional way to send these?

Thanks!