I just spent 1.5 hours with the Tech and they tested the website and the email address that is blocked from sending on my PC or when I try send using my iPhone, it does not send and I've found important emails in my darft folder I sent in November that were important had never left.
Also, I can't receive anyone who has an email address with the presidentsclubdayton.org either. The website is www.presidentsclubdayton.org and I have been having this problem since late last year.

This is the message I receive whenever I try to send a message with presidentsclubdayton.org for either an email address or using the website address in my email.

"There was a problem saving the message. Please try again later. (EP-4010)"

The Tech made a Note with here is a copy that was in the Note

"http://www.presidentsclubdayton.org/"

I was able to send the note as an attachment and it came through. Any ideas how this could be resolved?