Currently Being ModeratedJan 18, 2013 11:20 AM (in response to bmcdade00)
Yes, you can't send or receive email without port 25 being open. You could try a service like this to get around that:
Currently Being ModeratedJan 18, 2013 12:07 PM (in response to bmcdade00)
The easiest solution to your problem is either to host your MX in a data center or upgrade to business-class service from Comcast.