Dear, we use blacklists as a first defense against spammers. We have hese lists at our postfix server:
reject_rbl_client pbl.spamhaus.org, reject_rbl_client list.dsbl.org, reject_rbl_client bl.spamcop.net, reject_rbl_client safe.dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, Since the end of May blacklisting is performing worse. Is there an explanation for this? Are there other good blacklists you can recommend? thx.
