Re: CAPTCHA over smtp (yet another spam solution to discuss)

On Sat, Nov 11, 2006 at 03:37:25PM +0100, David Sanchez wrote:
> >Now, this last setup is in some ways quite similar to Instant Messanger
> >apps, except that if you want to communicate with everyone on IM then you
> >need your own accounts on every IM system. Also, I'd have to add friend
> >identities manually, to avoid the pop-up messages saying "XXX would like to
> >add you to their contacts, is that OK?", i.e. Spim.
> 
> IM spam could be more or less avoided with SPF and, at option,
> domainkeys and per user filters.

I don't see the logic. I mean, it probably differs between the
implementation of different IM systems, but in the simple case every client
connects to a central server [farm], and authenticates, before sending a
message which is relayed to the other user.

Therefore if I get a message saying

   "User 'foo_wombat_example' wants to make you their buddy"

and this message came from the server, then I'm quite happy that this person
really *is* a user who registered as foo_wombat_example on the IM system.

The question is, is this a spammer, or someone I want to talk to? Should I
accept the buddy request or not?

Regards,

Brian.