Re: Limit sent email to prevent spam
- At 05:56 AM 7/1/2011, you wrote:
>Hi to all,I fixed this very bad problem we had with postfwd rate-limiting on our outbound gateway. I harvested from past outbound logs our legit senders of volume mail and except them from rate limiting. All other senders that exceed the rate limit get HOLD. fixed or problem.
>i describe my scenarious and i'd like any suggest to resolve/limit the problem.
>Some user, in my University, reply to phishing email and give username and password of your email account; then the malicious send spam email up to we block account, but our server often will list in blacklist.
>There is a way to limit this problem? If i enable smtp-auth can i limit sent email in timestamp?Any other suggestion?
We have not been able to stop all phishing inbound (postfix/IMGate + clam + 3rd party sigs on MX, then barracuda for content-scanning), but even there, postfwd inbound rate limiting stops much of the phishing that comes in bunches of many 10s or 100s.
>Thnaks in advance