You cannot modify that. However you can indeed achieve this with some VBA.
--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
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"Jeff Popova-Clark" <(E-Mail Removed)> wrote in message
news:#(E-Mail Removed)...
> Hi outlook dudes,
>
> I am hoping to change the default file name in the SaveAs Dialog Box when
> saving an email to file (Outlook 2003). Currently Outlook uses the subject
> of the email as the default filename. However I'd like to include the
> sender or receivers name and the date and time in the filename as well. I
> know you can do it manually, but I'm hoping there's a way to populate the
> filename automatically. Is there a way to configure the default filename
> in Options? Or maybe you have to trap the SaveAs menu button event and
> write your own Save As Dialog window?
>
> Anybody have any ideas?
>
> Thanx in advance,
> Jeff P-C
> Gold Coast
> Australia