OK, looks like the proxy is not working properly. settings to try with the SSL table.
1. verizon.net pop3 110 none
2. incoming.yahoo.verizon.net pop3 110 none
3. yahoo.verizon.net pop3 110 none
and if none of those work I think Avast! will need to take a look at it. Or maybe another verizon.yahoo user will show up.