Agree with UncleMike. Even @domain.com will work, as this is how I have them set. Just include as much of the address in the filter as you need, but no more.
I actually like this^ way better, as it specifically refers to the domain. With the way I described it's possible it might match any domain that ends with the specified string. For example, specifying "ebay.com" might also match "abcdebay.com".