I just sent a message to myself and it went through. It was touch and go there for awhile but finally I got a email message that told me that I had a PM on RTF from myself!
I did get an error message yesterday when I submitted a post, telling me that I had had just posted something and had to wait before I could post again, but I may have clicked the "submit" button twice and deserved the error message. I'm not totally sure. It was just the one time.