Ian Paterson wrote:
(I should be able to specify the error message that's
returned to you when your message to me is blocked
because you're not in my roster -- at this point we have
something like a challenge-response system
Yes. IMHO this will be one of the most important anti-SPIM techniques
(along with the others discussed earlier - regarding registration, s2s,
etc...).
Hmm, well, I looked at RFC 3921 and it says:
If a blocked entity attempts to send message or presence stanzas
to the user, the user's server SHOULD silently drop the stanza
and MUST NOT return an error to the sending entity.
That seems counter-productive. There might be different reasons to block
communications, some more personal than others -- I might block the
message because I don't like you as an individual (in which case I might
not want you to receive an error, I'm just blowing you off) or I might
block the message because the sender isn't yet in my roster and in
general I block all such messages. So I think we might want to adjust
that in rfc3921bis.
Peter
--
Peter Saint-Andre
Jabber Software Foundation
http://www.jabber.org/people/stpeter.shtml
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