SherWeb — email and hosted exchange
Long story short is that this is the sort of bargain basement of exchange hosting. They are often unable to technically resolve their own issues and tend to push them off on others. They have a number of rather rude technicians and senior management just ignores attempts to reach them for resolution. It would not surprise me if the good reviews out here are fake and designed to keep their averages up. If you need a solid exchange company who is responsive to your needs as a customer I would look elsewhere. Also, their interfaces are a nightmare. It takes a lot of clicks to get to even look at your quarantined mail and the cumulus system is a counterintuitive mess. All of this is my opinion.