I try to find out how well the N900 works with our Exchange 2007 Server.
Windows Phones interact with Exchange server this way:

When you reply to an e-mail the phone just sends what you have written. The server receives this (short) answer text and compiles a full email including the original text, attachments etc. and sends it outside. This means:
If e.g. a hugh HTML email arrives, lets say with 1MB embedded pictures etc., the phone doesn't need to download the e-mail in full. Maybe just the first two sentences are enough for you to know what is the topic and you can forward it to an college. Even if the attachments are 30mb the e-mail is forwarded with in seconds while you are online with a slow mobile connection.

Most annoying of the iPhone is the fact, that e-mails are replied from the device (most people expect it this way, I know). But when it comes to HTML it results in a ugly reply with missplaced pictures and random fonts and sizes etc.

Sometimes I use a Palm Treo 750 to forward bigger attachments instead of my desktop computer, even if I am sitting in front of it. Everything stays 1:1, the speed of sending is like sending a SMS, no matter how big the body and attachments are.

My Question:

As far as I know "Mail for Exchange" is much more clever than this and interacts the Ex2k7 similar to ActiveSync on WM devices. So: what's the deal with the N900?