I'm coming into this conversation late, so if I am offering information that has already been covered, I apologize in advance.
I have a Comcast account, and have been aware for quite some time that I wasn't getting e-mails from Belize (in my Outlook express). The solution is to go to
www.comcast.net , sign into your web-based e-mail, and all of the e-mails from Belize will be in the "screened mail" folder. I just check it a couple of times a day. I always use the web-based e-mail when I travel anywhere away from my home office.
I realize that this still doesn't help the businesses in Belize who are responding to potential customers who are not aware where to look for their screened mail. It is too bad that BTL is hurting tourism in this way.
KC