email accounts wont register on network, yet work from home?

[blueyedsamurai]

The office network all of a sudden stopped access to a few email accounts, although they still had the same @ domain.

Other email accounts still work which is strange. I tested the accounts from home and they work?

The office computers are running office 2003-2010 so its not a problem with versions.

All computers run off the same network which doesnt have a server or any external firewall. They all run off
a home style network.

 

[blueyedsamurai]

those accounts were having spam problems as well, I'm also on a different ISP then the network