I am thinking about security in Linux. I had some problems in
Role based access control.
If I create a user for one application say ftp then in principle
he can use it to get email, pop-3 services. (by keeping noshell
he may not be able to telnet) Is there any way to restrict not
to get mail for that user. Same way the default pop3 daemon will
not be able to restict individual user level. I don't think
tcpwrappers will help in denying individual users. Is there any
way to restrict for pop3 users.