Okay, but that means you only get messages coming in--ones you might like to receive, say, every 15 minutes--when you make the effort to receive them.

There are many reasons to want to prevent messages from sending willy-nilly, among them wanting to be sure that you haven't inadvertently sent a confidential message meant for X to Y.

But since you're now using F9, did you know that you can create a "Send All" icon and put it on your OL 2013 Quick Access Toolbar? Click the little Customize gizmo to the right of your QAT icons and click All Commands (where Popular Commands is the default). Scroll all the way down the long list to "Send All" and add it to your toolbar.

Once you've done that, I suppose you could configure Send/Receive All Folders never to send (see the instructions at https://www.msoutlook.info/question/181 way down at the bottom of that page), and you'd accomplish, by a very circuitous route, what you're trying to do. I'm going to try all that myself now!

VeazyT