Using No Way As Way wrote:
Thanks for your answer.
The problem is users don't even know what a mailing list is.
They just select all contacts in addressbook and send the message.
That's what I want to avoid.
Maybe it is a wrong way to ask my question.
There's a patch I've seen discussed on the list that allows some
features close to what you're asking. I don't remember the name of the
patch, though.
Basically you want your users to only be able to send to 2-3 people in
the TO list, all others would be rejected, correct? You can limit how
many people they can include in the TO and CC fields by editing the
tcp.smtp file and changing the CHKUSER_RCPTLIMIT to a more manageable
number if you want.