I was getting nothing since my ISP upgraded my line to 5Mbps connection. I all of sudden got a "swack" of emails today about 30 a few of them were labeled junk and some where email errors (Warning: could not send message for past 4 hours) I had about 10 of those. Now it's all good getting my reports a 10min past midnight as usual test email message works again. I didn't do anything but leave the sever on for several days. The error cleared itself - Which leads to the only conclusion it as an ISP issue.