Use the ON JOIN event, see /help ON JOIN.
Example:
on @*:join:#channel:{
.msg $nick Welcome to # $nick $+ !
.msg $nick Please make sure you behave in here!
}
You must be opped for the above to work, also ensure that you change #channel for the channel name, and put it in a new remote file. If you have a bunch of rules to show people when you enter the channel, use the /play command, see /help /play.
Do note, due to the . in front of the /msg command, you will not SEE the messages being sent - but the other person will see it.
Regards,
