receive mail with sendmail

Hi Could any one please give links to any blogs (etc) which gives a detailed description on receiving emails to rails application with sendmail. I am using fedora12. I request help on configuring mail server (if needed) or can use mail server of another domain and forward it to my application. Dont know how to, since I am prety new to this. If what I am asking is blunder please excuse

Thanks Tom

Have a look at this:

Hope it helps.