I live in the mountains and have no other choice for internet except Xplornet. After years of frustration I finally got it figured out. Xplornet blocks my outgoing emails that have telus.net attached to them. This is their way of traffic management on their satellite, the support technicians do not know a thing about this as its done at a very high level in the company. I have had to change my email address's to gmail in order to skirt the issue.
Doe anyone else use Xplornet in conjunction with telus?