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 https://jmp.chat/ (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 https://jmp.chat/suggested_servers.html 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!