spam mitigation

[Dan Purgert]

On 03/03/2014 11:59, Paolo De Michele wrote:
> 
> hello everybody,
> 
> I have a mail server and inside there are a lot of websites
> how can I mitigate the spam to go out?
> 
> exist some solution that verify this?
> for example: domain1 can send max 50 email per hour, and so on.
> Can I be adviced with a email?
> 
> thanks in advance
> regards
> 

If you're trying to cut down on outgoing spam, then lock down the box.

* Block port 25
* disable relaying
* require authentication / TLS / SASL
* set up reporting to see "who" is sending all the junk.  Lock their
account(s)...