Good luck getting SmarterTools to address your issue. There have been multiple times that I and others have requested the ability to let users create and manage their own contact groups. Any product that advertises SM to be an appropriate replacement for Exchange MUST have this function, IMO. It is ridiculous to expect an admin to create and manage contact groups (or mailing lists, alias, whatever you want to call them) for hundreds of users. Had I known in advance of this glaring weakness, we would not be running SM. The pain and $$ of changing back to Exchange is hard to swallow...but is something that we are considering.
Since setting up an alias is a function that is already built into SM, I just have real difficulty understanding why ST will not make this available as a per-user function for end users. Actually, I have more trouble understanding why they won't even answer the many requests for this functionality.
Starts to leave a sour taste in your mouth after awhile.