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Bill Stewart writes:
BS> At 06:14 PM 7/3/97 +0200, Anonymous wrote:
Anyone heard of a proposal for ISPs to automatically sign outgoing mail headers? Problem has been that spammers send email by one path but forge a reply-to or from address at another location.
BS> Flat-out can't work. The problem is that you can send SMTP BS> directly from your machine to its destination, so the ISP only BS> routes the IP packets and doesn't read them. But it could - it's simple firewall technology. There's no MX record for sten.tivoli.com, but any incoming email to me is intercepted by proxy.tivoli.com, as is all other incoming traffic to the internal tivoli.com network on port 25. Since 'incoming' is only a matter of definition, it would be trivial for an ISP to set up a firewall that passed all other ports through transparently, but redirected connections with a destination of port 25 to their own SMTP server. I don't want them to, and I _certainly_ don't want the government goons requiring ISPs to do this, but don't sit back and relax with the notion that 'it can't be done'. - -- #include <disclaimer.h> /* Sten Drescher */ Unsolicited bulk email will be stored and handled for a US$500/KB fee. It is by caffeine alone I set my mind in motion, it is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning, it is by caffeine alone I set my mind in motion. -- Carlos Nunes-Ueno, 3/29/95 -----BEGIN PGP SIGNATURE----- Version: 2.6.2 Comment: Processed by Mailcrypt 3.4, an Emacs/PGP interface iQBVAwUBM8HOXPCBWKvC9LiRAQH9UgH9FfIuo+i1ms0DRI/dZC9goTlULgY+HnnR oxeAFmvAvLNBxjXGVZhQinZJs7yTob7x1ZGPIDZzaGV9FXwauBIdRA== =lZvI -----END PGP SIGNATURE-----