Efficiently sending emails to a distrubution list.

Hi All,

I am developing a website for my dad whereby there is a mail form that allows users to subscribe to his weekly newsletter.  This mail form takes in their first and last names as well as their email address.  When the user fills out their details and clicks submit, a Perl script then extracts their information and writes it to a text file.

When he publishes the newsletter and then decides to email out to his subscribers (approx 10000 people) he wants a quick and easy way of doing this from his office.  My (not very good idea) was for him to ftp into the webserver and get the subscriber email text file and then copy and paste all the email addresses into his mail application and then proceed from there.  But he doesn't like that idea as it is cumbersome slow and inefficient and he would get a lot of "Mail Undeliverable" responses because of dead email addresses stored.

Is there anyway that he can send one email to the server, and then the server mass distrubutes his newsletter from there??  Or is there any other clever idea's from anyone out there??

Thanks to all those that can help and offer suggestions!


Beno