If the No-reply Address contains "noreply@www.domainname.com" then the forum email to students will show their name. Also, the "send via" switch also works.
Okay, in moodle.org I kind of like the "via ..." gone. I filter these into their own inbox anyway.
However, for my courses, I am going to use the "via..." addition so that students know that this email is coming from my moodle instead of directly from another student. I am thinking that students might appreciate this. Do you have any thoughts about this? What do students seem to like? When you do the moodle MOOC, what do you hear back from students?