I suppose I could set up one of my sites to forward. For example I could set up yourname~AT~aavoicepro.com and have it forward directly to yourname~AT~yourdomain.com.
I know that works. I've tested it.
I'd have to charge for it, though. That could create a problem for my employer. But I wouldn't think it'd be much. Perhaps $50/yr +MAC for <10 users.
What a pain in the rear.
Ralph