I've noticed that same problem for sometime now.

Dennis,
From my phone.
________________________________
From: Tom Young<mailto:tomyoung1@COMCAST.NET>
Sent: ‎10/‎9/‎2015 11:24 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: I'm not receiving original posts where subject stars with a date

Here's an oddity.

There have been a couple of recent posts that had dates (XX/XX/XX) at the
start of their subject lines:

10/07 TIPS for Passing CA test-only smog? An 1981 air-cooled
Vanagon camper

and

10/09/2015 How to clean up and return that new, never-needed,
starter for a full refund?

In neither case did the original post show up in my e-mail client, Microsoft
Outlook.  They are not in the client's "Junk file" and they are not in the
ISP's spam bucket.  They seem to have wandered off into the aether.

Anybody else notice that?

Any thoughts as to where those messages wandered off to?