Previously I have wrote lj2mail – a script which gets fresh posts from LiveJournal and emails them to the list of recepients. I have tried to avoid sending same items over and over again, but failed. The script was implemented with the help of LiveJournal API (LJ::Simple Perl module).
I got annoyed by that script repeating some items (mess with publishing date), so I wrote a different one. rss2mail simply gets the RSS feed, parses it and emails items as individual messages to the list of recepients. I guess that caching RSS item link is much better than LiveJournal’s publishing date. Also, rss2mail is much more flexible. It can be used with any RSS feed, not only LiveJournal’s. I have tried to make it as generic as possible. If it doesn’t work with other feeds, just check the fields of the RSS feed it uses.