Another attack to fight off

[Scott B. Anderson]

Check /usr/share/sendmail-cf/m4/proto.m4  You will find the same line you found in your sendmail.cf, except this is the source file - if you upgrade sendmail you'll need to hack this again every time too. Probably easiest just to temporarily hack the sendmail.cf.

Again, doing this violates at least RFC 1123, which requires that all senders use <> around the address and that the blank <> address be valid.
Scott


> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-
> bounces at lists.mailscanner.info] On Behalf Of Vlad Mazek
> Sent: Thursday, February 28, 2008 5:27 PM
> To: MailScanner discussion
> Subject: Re: Another attack to fight off
>
> Keep in mind that rejecting/deleting these violates RFC.. But if you're
> despearate, change:
>
> R<>                    $@ < @ >                        MAIL FROM:<>
> case
>
> to:
>
> R<>                     $#error $@ 5.1.3 $: "RFC Ignorant, and proud of
> it!"
>
> -Vlad
>
> On 2/28/08, Raymond Dijkxhoorn <raymond at prolocation.net> wrote:
> >
> > Hi!
> >
> >
> > > Can we use MailScanner to delete the incoming messages with
> "from=<>"
> > > in them? Would that be practical?
> >
> >
> > If you want to delete bounces, tell your mailer to do that.
> >
> > Bye,
> >
> > Raymond.
> >
> > --
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> >
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> >