I have it all set up properly as far as I know. It may be related to the MUUG list sending e-mails on my behalf. From the little I've read about this particular situation, it opens a whole new can of worms. I may have missed something on my end, for sure, as I am totally new to running my own e-mail. But it has been working great so far.

The attached report I got from Google may help figure out what's going on.