Is there any way to control the malware infected computer, not to send more then counted or limited messages.
On Wed, Sep 11, 2013 at 6:57 PM, Wietse Venema <wie...@porcupine.org> wrote: > Zel Uneec: > > On 11.09.2013 14:43, Wietse Venema wrote: > > > /etc/postfix/main.cf: > > > smtpd_reject_unlisted_recipient = no > > > smtpd_recipient_restrictions = > > > permit_mynetworks > > > permit_sasl_authenticated > > > reject_unlisted_recipient > > > ... > > > reject_unauth_destination > > > ... > > > > > > It's is very easy to screw this up and become a backscatter source. > > > That is why "smtpd_reject_unlisted_recipient = no" is not the default > > > setting. > > > > > > > Thank you Wietse, that is what I was looking for! So, for now, my > > problem is solved. > > > > Just one more thing: Will this setting have some kind of (big) negative > > impact? I guess not, but just to be sure... > > Yes. When a client becomes malware infected, it will send spam with > a false sender address, and Postfix will return some of that spam > to innocent people. > > Wietse >
