[Mailman-Users] restrict subscription, unsubscription and send mails in mailman list

[Amaury Viera Hernández]

Hi everyone:
I just arrived to this list and I'm needing your help. I have a mailman list and I need 3 things (I couldn't find this in google and in http://wiki.list.org/DOC/Frequently%20Asked%20Questions):
1- I need that the users couldn't subscribe to the list
2- I need that the subscribed users can't unsubscribe
3- I need that just some users can send mails to the list

Regards and Thanks in advance, Amaury.
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