Milter-greylist

Hi Maren,

On 2016-09-08 09:12, maren.zubizarreta@... [milter-greylist] wrote:
> Hello:
> 
>  We want to implement an ACL with a ratelimit per authenticated user,
> this is to prevent SPAMMing when one of our  user's credentials are
> stolen, and a SPAMMER using different IPs and the same user
> credentials tries to send SPAm throuh our system.
> 
> Is it possible to do it using milter-greylist? I haven't found how.

Would interest me too, good idea! Do you think changing IPs on a 
smtp-auth account is a good hint of abuse? What if all spam is sent from 
one IP, e.g. if a users notebook is infected by a virus and uses your 
smtp relay to send spam. May be a hard limit number for a user account 
combined with changing IPs and/or geoip.

Ciao
Marcus