Hi Mark, I thought you were trying to create a MIME email.  They're really not that difficult -- once you create one MIME email, you'll find it's pretty easy.  I find they generally look more professional than strictly richtext emails, just my opinion.

 

You can run a LotusScript agent in the PostSaveDocument event (which is the way I did it in 8.5.1) -- I think now in 8.5.2 you can also get a handle to the in-memory document in the QuerySaveDocument event too.  You're right there's no @MailSend anymore in XPages.  But you don't have to run a LS agent; you can also write some Server-side Javascript using methods & properties that look a lot like LotusScript, take a look in the Help -- you should be able to just append a doclink to a richtext item via SSJS if that's your desire.  So you'd just need to create a virtual/temporary Form="Memo" document and add a "Body" RT field & create your email that way & then do a doc.Send at the end. 

 

Here's a snippet from the Help: