You can easily send mail by ssjs.  Shouldn't be a problem.  Conceptually it's the same thing as LotusScript.

I believe Domino 9 also has a simple action for sending mail but I've not tried that yet.

This is very simple.Please refer the following code.

doc1 = database.createDocument()
doc1.appendItemValue("Form","Memo");
body = doc1.createMIMEEntity();
subject = body.createHeader("Subject");
var sub= String(getComponent("subject3").getValue());
stream = session.createStream();
subject.addValText(sub,"iso-8859-6");
stream.writeText("text");
body.setContentFromText(stream, "text/html; charset=iso-8859-6", 0);
var intaddress=new Array(@DbLookup(db,"($Users)",memberlist[j],1));
doc1.appendItemValue("SendTo",intaddress[0]);
doc1.save();
doc1.send()