[Standards] Expected behavior when blocking all unknown JIDs

ValdikSS iam at valdikss.org.ru
Sun Feb 5 05:44:09 UTC 2017

Please read this: https://mail.jabber.org/pipermail/operators/2016-November/002896.html

I'd like to have server-side visual or Q/A CAPTCHA on the server side.

On 16.01.2017 19:22, Goffi wrote:
> Le lundi 16 janvier 2017, 17:03:51 CET W. Martin Borgert a écrit :
> I was not thinking about greylisting (because the delay can be annoying), but 
> about a challenge, either simple captcha (but would be possible to defeat for 
> advanced spam software) or a computational challenge (i.e. the sender has to 
> do some resource costly computational challenge, but the result is easy to 
> check). In the captcha case the good point is that we can use a text fallback.
> Greylisting could be an option too, not sure how efficient it would be in XMPP 
> case, and if we could implement it without breaking backward compatibility.
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