Hi,
I use RBL, RDNS, SPF and BATV options but no greylist option for SMTP proxy. Incoming spam mails are checked against these rules with success. I am having troubles with outgoing spam mails. A few of our users seems to be infected by virus. As there are 5000-6000 mails per day for each mail traffic. These mails seems to be forged by some malware. These destination addresses are not valid so they wait in smtp spool.
What should I do to prevent these kind of outgoing spam? Yes I added some expressions about their content but I cant check every outgoing spam and write expressions for every different content.
Here the one of the spam destinations:-> ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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