I am sorry if I missed the frequently asked questions and answers. But what I am actually talking about is regarding the servers, not the email accounts.
The two email accounts I have are from two different mail servers within the same organization. So they both have same domain name, say work.edu, but two different server names: serv1 and serv2. When I tried to config both of them, spamcop could recognize both, but always replace one with the other, which means I can only config one of them, not both.
Question about gmail is different. I could not get it configed at all. since it's not listed in the help (how to get full header) like yahoo, I had to ask.