ive been looking into added value for my site visitors and think offering a free email service with my domain name would be good, ideally i want to host the software on my webspace which is a shared server but i may consider a dedicated server (ive been considering moving the site to one for ages).

does anyone know of software i can install that would allow a customer to sign up etc automatically (and basically does not require any intervention from me to setup a customers account), offers customer webmail and pop access, and preferably is cheap/free.

ive had a look at reseller accounts etc but they all look more hassle than they are worth.

with all the different software for website around now there must be something.

thanks in advance