Thanks for replying Andrew. I was aware of the email blacklist conundrum, because emails sent from a website hosted by Network Solutions were only intermittently delivered. I read the articles, and the advice given doesn't help me much. I am hosting a website for a non-profit and I have 27 members who need to be able to receive email at our domain name in the form email@example.com. And each of these people use various have email permanent accounts at various other places. So, for the people who use comcast and aol, I have a workaround that uses a new gmail account that I created and use as a bent pipe. I have the dreamhost emails forwarded to the gmail account, then the gmail account forwards the email to comcast or aol. It's kludgy, but it works.
I have some who get there mail at yahoo, gmail (of course), aol, earthlink, verizon and comcast. So I had to create an special email address at Google, and now I forward all emails destined for aol or comcast to the google email. In the google account I set up filters to forward the emails to the