John, what kind of email are you trying to generate?
Is it an email as part of a workflow? For instance: IF John creates a document AND Geoffrey's name is in the title, THEN send Geoffrey an email letting him know and include a link to the document in the email?
If this is the case, then you'll want to look into creating some basic workflows using SharePoint Designer.
If you're looking to be able to construct an email using SharePoint and have it sent from SharePoint, that's fairly easily done as well - but we'll need a little more information from you.
If you can tell us what the purpose is of the email you're sending, we can suggest something else.