I'm also having problems with mail that's set up via cPanel:
This message was created automatically by mail delivery software. A message that you sent has not yet been delivered to one or more of its recipients after more than 24 hours on the queue on sg2plcpnl0159.prod.sin2.secureserver.net.
This is crazy. I called Support yesterday and they said there was a problem, and it should be fixed in a few hours. This has been happening for a week now. I am wondering if I should switch the account to US servers, instead of the SA one.