Why won't my Cantv.net email address work in the community?

Despite our best efforts, Cantv.net insists on blocking email from our server. We utilize a double opt in process to verify all email addresses and their intentions to register for our community. We never misuse or sell our visitors information. We requested removal from the block list, but have not received a resolution.

Background Information:

New members cannot use a Cantv.net email address to register for access and current members with Cantv.net email addresses cannot receive email from Cheresources.com.