Thunderbird and POP

[littlelizard]

I have kind of a weird thing going on. Could by something with Thunderbird, don't know.

I have two domains that I check mail for via TB. When I first start Thunderbird only one account will download - the rest I get the same "empty" error on. A perusal of TB's forums shows that the particular empty error is because the POP server cannot be found.

When I select each mail account and do a "get mail" everything downloads fine.

I flushed my DNS in case I had some caching going on there. Both domains had hosting switched from elsewhere to WHB after mail had been set up.

All pop accounts are set up as mail.mydomain.com with a port of 110. I use my ISP SMPT settings (no problem sending at all).

Any ideas?