How to create Notes Calendar Invitation via e-mail

I am trying to use the WebSphere e-mail adapter to send an SMTP message to a Lotus Notes user. I’d like this message to appear as a calendar invite in the Lotus Notes Inbox. Does anyone know what the structure of the e-mail message needs to be in order to get Lotus Notes to recognize the e-mail as a calendar invitation?

Thanks.

Subject: iCAL attachment

Since you’re sending into your Domino system via SMTP, you’ll need to construct an iCAL attachment with the invitation data which Domino will then convert. It’s a fairly straightforward standard and there is an open source java lib for it called iCal4j.

Links:

http://www.ietf.org/rfc/rfc2445.txt

http://wiki.modularity.net.au/ical4j/index.php?title=Main_Page