That is not a native Outlook option but can be achieved by an addin;
http://addins.howto-outlook.com/dsd_bellsandwhistles
From the description;
"Save time on Outlook email replies by automatically adding smart reply
greetings and email signatures."
--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
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"KCE" <(E-Mail Removed)> wrote in message
news:8CB35881-EB9A-41C6-940A-(E-Mail Removed)...
> Is there any way that you can create an auto greeting for your new emails?
> Ideally, you would enter a contact in the "To" field and it would
> auto-fill
> "Dear <Contact FirstName>" in the body of the email. Is this possible?