Hi, It looks like we are experiencing the mail attack now. In our maillog, we have a lot of User Unknown message like the following. Aug 23 11:52:25 s1 sendmail[2110]: j7NFqPL02110: <Oscard@xxxxxxxxxxxxx>... User unknown Aug 23 11:52:25 s1 sendmail[2110]: j7NFqPL02110: from=<>, size=17601, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=mail.vis-inc.net [66.77.28.202] It looks like that all the from is <>, does anyone have the way to fight against it. Jessica -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
