Thanks for the links. It seems my knowledge was outdated.
Do you have any links for the "solutions for the abuse problem" part? They should make for interesting reading.
Do you have any links for the "solutions for the abuse problem" part? They should make for interesting reading.
A solution is using address like greeting@name (meaning localpart@dnspart) https://linuxfr.org/users/apichat/journaux/salut-toto-saluta...
An other solution is the design of XMPP : you can control who can speak with you (the contact list).