First, testimonials… I’ve been using Appriver SecureTide for more than a year. Awesome. It plain works, plus good support when you need it. Point your MX record at them, they filter spam and virus’, then forward the good stuff. Beats the heck out of onsite solutions.
Now for the answer…
Without opening the email, right click the item to kick an Outlook menu. Select Options, or Message Options to get the following:
Copy the contents of “Internet Headers:” Paste it in an email and send ’em to me.
Appriver provides more detail for collecting header info from various email clients.