> Hi friends, > > I have some problems with my sendmail server. > it has sending some garbage mails to outside and that > mails bouncing back to on different user that is not > existing users. > the error are like > ----- The following addresses had permanent fatal > errors ----- > vbqdfwhgvokn@xxxxxxxxxx > (reason: 550 5.5.1 No such user here) > > ----- Transcript of session follows ----- > ... while talking to data2.centrum.cz.: > > >>>>>> DATA > > <<< 550 5.5.1 No such user here > 550 5.1.1 vbqdfwhgvokn@xxxxxxxxxxxxx User unknown > <<< 503 5.5.2 Waiting for RCPT command > > Subject: > Returned mail: see transcript for details > From: > Mail Delivery Subsystem <MAILER-DAEMON> > Date: > Thu, 15 Jul 2004 21:14:34 +0530 > To: > vbqdfwhgvokn@xxxxxxxxxx > > The original message was received at Thu, 15 Jul 2004 > 21:14:34 +0530 > from root@localhost > > ----- The following addresses had permanent fatal > errors ----- > craig@xxxxxxx > (reason: 550 5.1.1 User unknown) > ----- Transcript of session follows ----- > 550 5.1.1 craig@xxxxxxxxxx User unknown > > could any one please tell me how to stop this. > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list Well you definately need a firewall on your loopback interface which does not allow outside packets to connect except yo ISP to smtp port etc..Basically do not allow packets from the outside .Else u have a machibe in your LAN with a virus that is spamming , u iwll have to monitor your maillog . Wat do others think ???? Rgds Duncan Rack -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
