Eric Dahnke ([EMAIL PROTECTED]) wrote:
: Hello List,
: I've got a dialup client with a qmail/fetchmail/serialmail instalation
: acting as their mailgateway. The client wants to restrict some of the
: accounts to internal mail use only.
: Question is, how can I keep such restricted users' messages from ending
: up in serialmail's outgoing pppdir?
: (obviously, the restricted user would never receive any external
: messages, but he or she would be able to send to any external address
: they like, no?)
The solution I implemented for a client was to permit all outgoing
mail, but restrict incoming mail to only those privileged.
It's pretty hard to know the credentials of the person relaying out.
SMTP does not provide a way.
If you still want to restrict outgoing, if you know their IP
addresses, you can block these (unset RELAYCLIENT or firewall them).
But it's trivial for a Windoze user to change his PC's IP.
-harold
