For about the past 3 weeks, my sentbox on the online version of outlook has shown that my hotmail account has been apparently sending the same e-mails about every 20 minutes. All the e-mails are plain text with no attachments, and were originally intended to be sent to an e-mail address I've sent e-mails to before. Initially when I first tried to send these e-mails I got a delivery failure message - they were rejected by the server. Since then I've been able to send e-mails to the same address absolutely fine. However, despite these e-mails appearing in my sent box constantly, the recipient has told me they never get any of these messages and I don't get any delivery failure messages. Since this has started happening I have also had some trouble with e-mails not being received by people I send them to and myself not receiving some e-mails (they have not been wrongly put in the junk folder!).