RE: [Full-Disclosure] Block notification / bounce mails (as in DDOS)
From: Richard Gadsden (Richard.Gadsden_at_cobbetts.co.uk)
To: <email@example.com> Date: Fri, 2 Apr 2004 14:55:44 +0100
Security <mailto:firstname.lastname@example.org> wrote on Thursday, 1 April 2004 3:06 p.m.:
> What would you do when a spammer uses your mail-address as the
> "From:" and the mails that are sent by the spammer get all bounced
> back by legitimated mail-servers to your mailhandlers? All the
> bounces would return to you - as you are the 'from' (assume a rate of
> 1.000 a minute) and this traffic would kill your network-connection.
> You wouldn't be able to receive any mail because your mailserver can
> no longer handle the load </question>
If you can manage this, start breaking an RFC and throw out anything with
a MAIL FROM:<>
That should get rid of the bounces but not the annoyed replies from hostile users.
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