Thank you for responding. I don't seem to be having any difficulty with sending emails. And I am not getting any error messages with regard to receiving emails. Several clients indicated earlier today that they sent me emails last week, but they are nowhere to be seen in Outlook 2007...nothing in my inbox, nothing in the junk folder. Also, within my office, several messages from my staff have never arrived in my mailbox. Yet, I am receiving some emails from various sources. Some seem to make it through and others don't.