Re: spam-filtering policy

Mike Peppard wrote:
> I'd also recommend the white list be specific to individual email accounts and your employees have an easy way to add or remove entries from their white list.
>   
One problem with this approach is that most spams these days are sent 
with a forged sender address.  Personally, I'd suggest whitelisting IP 
addresses instead.

> It could be an auto reply from your company that triggered the list or it could be that you're an open relay, or perhaps you're not giving an spf per RCF4408 or a combination of problems that triggered an alert. Being from Asia as you are, you might want to let their email administrator know that banning that whole IP range will limit their ability to do business.
>   
My guess is that their mail server was caught sending spam and was 
listed on a third party blacklist that the recipient's organization was 
using.  However, I agree that the sender should contact the recipient's 
e-mail administrator and work with them to determine why their mail 
cannot get through.