Spam filtering bcps

Wed Apr 12 23:56:12 UTC 2006

Bryan Bradsby wrote:

>>Silently deleting other people's e-mail should never even be considered.
>>    
>>
>
>Unless that email is a virus, or a spam with a forged envelope sender.
>  
>
Why?  - You can scan for viruses inline using a variety of products (eg: 
I have patched Postfix to use clamav inline on modest hardware (single 
CPU AMD64 will do it, so will a Dual PIII 866) and it will accept 
messages at 50 messages per second (sustained load) and scan for viruses 
before responding to the end-of-data command, rejecting if a virus is 
detected.).

Spam is a different subject altogether - are you that sure you can 
detect spam without a false positive?  If so then why aren't you doing 
it inline?  If you can't why are you blindly deleting the messages? - My 
BCP comment is if you can't detect inline (eg for performance reasons) 
tag it and deliver it (if you have the capabilities, deliver it to a 
junk folder) - that way you are following the RFC's and no non spam mail 
is deleted by the system.

Regards,

Mat