Hello,
Someone is using another smtp server to send a very big spam, but they
write the header with FROM = an unknown user of one of my virtual domains,
so postmasters keep sending bounce messages or autoresponders to this
unknown user and my postmaster is receving more than 10000 emails.
I've temporary created this unknows user, but how can I stop this? I
can't remove the domain of my list of virtual domains because there are more
then 100 valid users to this domain...
The spammer is from USA and I'm from Brazil, I don't known this f...
I really need help!!!
Thanks,
Ari
