SMS being popular where exactly..?

Beside that I don't suppose you'd just block period, without giving a legit 
human user the way to authenticate as such and unlock communication.

---- Denver Gingerich ha scritto ----

>On Thu, Feb 08, 2018 at 02:27:50PM +0100, Jan Pinkas wrote:
>> We need technical solutions:
>> 1. Default behavior: don't accept messages from contacts without
>> subscription. This is default for other IM systems.
>This is not the default for the most popular IM system: SMS.
>Please do not implement this on your server, otherwise many useful services 
>(such as those that emulate or integrate with SMS) will not work anymore, and 
>your users will have no idea why.
>There are lots of other ways to combat spam.  I've outlined the steps used in 
>the Prosody configuration that I and some friends use here: 
> .
>I built and operate (JMP) - a service that lets you send and 
>receive text and picture messages using a real phone number from your existing 
>XMPP account.  Though we like to advertise that XMPP is great and you can use 
>any XMPP server with JMP, we realistically won't be able to do that much 
>longer, exactly because server operators are starting to use the "strategy" 
>you described.  We constantly have to debug situations where a user's server 
>suddenly stops allowing messages from contacts not in their roster, and it is 
>very painful, both for us and the user.  We do maintain a list of recommended 
>servers at but not everyone wants to 
>use one of those (or maybe has an account elsewhere already).
>I really don't want to create a public list of non-recommended servers (i.e. 
>those that do not work well with JMP and other SMS services because they 
>silently ignore messages from contacts not in their users' rosters).  So 
>please use other spam-fighting techniques instead, such as those discussed in 
>the Manifesto, and those at 
> .
>I'm happy to respond to any questions about this or about JMP generally.  
>Thanks, everyone, for your work to improve the state of XMPP servers!

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