See http://support.microsoft.com/kb/826838. There, MS has this:

Similarly, http://support.microsoft.com/kb/294694 says:


Since your propsed filename comes from a mergefield, these two articles seem to rule out doing it automatically with Word's standard tools. Your friend could, perhaps, have a macro that runs in the background when executing the mailmerge. One wouldn't necessarily see anything unusual when this happens and the email personalisation might be the only visible effect.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

But Macropad, why is it doing it for me now?

When I get to 5 of 6 in the wizard, I select all, copy the contents, open new doc, and paste, THEN send emails as pdf attachment and it's filling the subject line and naming pdf filename with the property address.

I didn't install no macro's so how do you explain this?

It's working because, by your own admission:
The workaround is that you're creating the PDFs and emails individually, instead of letting Word do it in bulk.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Perhaps we are misunderstanding each other.

Why is it autopopulating the subject line and naming the filename with the property address like I want it to when doing it from the new Word doc?

However, when I do it from the original Word doc it's naming it with the original filename?

Probably because it takes whatever happens to be the active document's name as the 'name' for the subject line. Without having access to whatever code Word uses for this part of the process, one can only surmise...

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]