Doesn't gmail let people see if they responded to an email right in the inbox? I haven't used it in ages, but if the globals really wanted to, they could get Stefan to craft @graalonline.com's email system so it works like that.
They can have
[email protected], and folders like "Tig", "Bell", "Xor", "TSA", so if say, Tig sees an email meant for Xor, he can move it to the "Xor" box and Xor could check it later.