Comment Re:So what exactly is it blocking? (Score 1) 145
Wouldn't it be easier to filter outbound packets destined for Gmail's SMTP servers and prevent Chinese email users from sending email to Gmail users? (This is an honest question.)
I think you mean Google's MX servers (the remote end when sending email through SMTP). If so, in a word, "yes", much easier, assuming users are using SMTP servers based in China. Indeed, you could simply prevent the connections from ever taking place, simulating authentication errors.