As the host to detect spammers among customers?


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Need your advice.


What software need to provide hosting?

While stopped on:
  • CentOS x64
  • ISPmanager pro
  • Apache mpm-itk php 5.3
  • php 5.2 CGI
  • MySQL 5.1
  • munin — monitoring problems iron



Interested in your opinion on this list.


And I didn't find any information about the software that I'd caught among the clients mail spammers and those that use CURL. Or even were caught, and at least doing some monitoring that I could respond to abuzy and to localize a specific user.
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3 Answers

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enable SMTP authentication for users and analyze logs of the mail server with the withdrawal of top of the most active usilitelei emails per hour for example. As an option — define boundary values and shove into the monitoring system
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Better to prevent spam and not to look, because in many cases the user simply hacked and does not know that his account sends spam.
Spam can be sent in two ways
1) installed the mail server (e.g. exim)
2) Directly from php, perl, etc.
\r
To prevent spam you need
1) To prevent sending a first option to set limits for users, if you have exim, similar to this. Of course, follow the instructions, don't, just watch there realized
2) Close the iptables means all outgoing connections on mail ports to all except a user running exim
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To prevent spam — the best way:
1) to capture this moment in the customer agreement( if not concluded in writing, in the offer on the website)...
2) before the institution of a new client is talk to him and discuss it..
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