If somebody who's on vacation or bussiness trip in one of those countries sends email to one of your users, it'll get blocked.
That's incorrect. We're filtering on the SMTP country of origin not the
sender's country of origin.
Exactly. If I'm on trip to China, I might as well use local ISP to send my mails. For example, ISP might block outgoing connections to port 25 (something many ISPs do these days). You'll block by SMTP country of origin (China), so you'll block my mail.
-- Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7