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On 10/11/15 09:26, Simon Josefsson wrote:
Hi.
I'm operating my own xmpp/jabber server since a few months ago, and I have began receiving spam. This seems like a generic problem affecting anyone operating open/federated xmpp/jabber servers. Are there any guidelines on how to configure free software xmpp server to deal with spam? Are there any DNS-based xmpp spam blacklists available? How do the existing larger free xmpp communities (FedRTC, debian.org) deal with spam?
I assume SIP have the same concern, are there any efforts in that community to deal with spam?
This is an issue that you may want to raise on the XMPP operators list:
http://mail.jabber.org/mailman/listinfo/operators
Both SIP and XMPP require stronger identity verification than SMTP so it makes spamming a bit harder but it is not 100% impossible.
How much spam are you receiving?
How many users on the server and does everybody receive equal amounts of spam?