For months I have struggled with a problem of replying to a message I had received and then after clicking "Send," getting an error message saying the mail cannot be sent because it has been changed (not the exact wording but close). I even got the message when the antivirus was turned off. To get around the problem I would copy the text I had typed, close and reopen the message, paste the text back into it and then it would send. Now it has gotten worse. I just spent ten minutes writing reply to a message, I clicked "Send," the message disappeared and then the error message pops up after the work I did has vanished into the ether. I have adjusted antivirus and firewall settings to see if they were the problem but nothing works. I can find no way of recovering the typed text and was never given a chance to even copy it to the clipboard to save it. Short of a nuke and rebuild can anyone offer a suggestion as to how to fix this mess.

Thanks for the good info. I had looked and looked for an auto save timing setting but never found it. I even Googled it and couldn't find the answer. Now if someone will tell me why Outlook tells me it can't send the reply because it has been changed I will be really happy.