[BlueOnyx:11972] Re: Spam Anti-Virus Solution For 5106R

[Maurice de Laat]

On Thu, Jan 10, 2013 at 01:45:43PM -0600, Chris Gebhardt - VIRTBIZ Internet wrote:

> 2. External MX gateway used as "spam firewall".  There are several 
> providers of this as a hosted service (MXLogic, Postini, VIRTBIZ) or as 
> a hardware device (Barracuda, Ironport).

I don't recommend this because of the false non deliverables this solution 
often produces.

Also, when taking this route, it is recommended to use appropiate 
firewall rules to accept only incoming connections on port 25 originating 
from your MX gateway, in order to prevent A-record spam.
-- 
Maurice de Laat