295608 Multiple address mail script

I need a script where an invitation to visit a website can be send to multiple mail recipients. Requirements: - Sender has to enter a name and a belonging emailaddress - Up to 10 names and addresses can be entered - Validation of entered mailaddress - Sender can enter name and emailaddress - Sender can enter how many mailaddress he wants to send - Receiver gets invitation, with name and address from sender - Receiver also gets invitation from website's mailaddress as sender - All names and mailaddress of senders and receivers has to be collected in a commaseperated text file - I could come up with one or two small things more