I am going to try the following tonight.
1. Verify with Comcast their Primary and Secondary DNS numbers. The 4 WVC54GCA still use Comcast old number and not the 75.75.75.75.
2. I want to verify with ATT Yahoo that port 567 is still the port to use and if their smtp is still the same.
3. See if all my WVC80N have the latest firmware.
I will keep you posted.