Hi, I'm writing an ASP.NET application where I'm required to read emails from our exchange server and also send replies to some of the messages. I'm using WEBDAV to connect to the Exchange Server. I'm able to read emails and also send new emails from my app. However, I'm not sure how I can send a reply to an email using webdav. Can we set the in-reply-to mailheader field in some way? I haven't come across any samples for this. Has anybody faced this problem? Any help with this will be greatly appreciated. Thanks, Sambhu