[LINK] Solution to SPAM checking
Adrian Chadd
adrian at creative.net.au
Thu Feb 1 13:14:44 AEDT 2007
On Thu, Feb 01, 2007, Adam Todd wrote:
> Many of us who are mobile already use authentication between the random
> remote user and the SMTP server to verify that the inbound mail to be
> processed is in fact coming from an authenticated and approved source, and
> then that user is in fact allowed to use the SMTP server for mail
> transmission.
That may stop people from spamming with forged from: addresses, but it
won't stop spam:
* spammer registers domain(s);
* spammer sets up DNS for domains on botnet-owned hosts;
* spammer sets up authentication for domain on said hosts;
* spammser sends lot of mail
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