We have a client that uses outlook as the mail client and a POP3 server. When the client sends an email, recipients in the office or out of the office recieve the email about once every hour. No one seems to know why. The coworkers of the induvidual do not have problems of this sort and they use the exact same server and client. Google and this site have turned up other instances of multiple sends, but none which match these characteristics. I read that sometimes Norton AV can interact with Outlook to send multiple copies, but the 45-60 min delay between copies doesn't seem to fit the description I read. This is an urgent question with many unknowns, hence the 500 points.