What is the best way to send one-way messages over the Internet on a PC running Win?

Question

Computer networks

I have been looking for a solution for the past 2 weeks, so I did not find anything sensible.
I tried the solution from www.bopup.com , I liked it, but no thanks for that kind of money.
I was looking for xmpp clients only for reception, I also did not find sensible ones.
Essence:
There is a server
There are 180 clients in different parts of the city and outside the city
What is the best way to notify them instantly? They are only interested in one-way sending, the client should not be able to answer (he has nothing to do with it).
Thanks in advance.

Answer 1

In general, the solution to this problem 2, or buy programs, and there are quite a few of them, and their price bites.
Or write a custom program.

Answer 2

You can write a simple application using WebSockets or even simpler using ajax comet . I can write an application in AutoIt or in C. Server on node.js. Want to?

Answer 3

In Jabber, you can set up rules on the server so that messages from users or groups are ignored.
Yes, even in the usual Miranda / QIP, you can add all users to your contacts, and then put an incoming filter without having access to the server. This is standard Jabber functionality. In Miranda, it is visible after connecting to the server, it is called "Privacy lists".