I’ve been using MXRoute, which is about as inexpensive as one could expect (~$40/year for a storage tier, unlimited domains and accounts up to that storage limi

I’ve been using MXRoute, which is about as inexpensive as one could expect (~$40/year for a storage tier, unlimited domains and accounts up to that storage limit). It’s been rock solid reliable for the last few years, but it does require a bit of DNS knowledge to really setup properly.