[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: SendMail sending garbage mails



> 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 centrum cz
>     (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 centrum cz    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 centrum cz
>
> 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 abc net
>     (reason: 550 5.1.1 User unknown)
>    ----- Transcript of session follows -----
> 550 5.1.1 craig abc net    User unknown
>
> could any one please tell me how to stop this.
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request redhat com?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



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]