Email functionality

Hi,

I am using JSF and apache 5.5.I have built a discussion forum and now want to implement the watch list functionality.Users would add a topic in their watch list and whenever that topic is updated the user should be alerted with an email.How can i implement this functionality.

Thanks,

Gaurav Goel.

[326 byte] By [Gaurav_Goel_arrka] at [2007-10-2 23:59:39]