Why do these PDFs disappear?

Question

In the past I've never had anyone tell me a PDF I sent was not visible in an email. Now they do tell me that on this project.
Probably most were sent to Mac users, but I don't think all were.
I create a PDF in InDesign CS4. A one page doc, mostly type. These PDF specs:
    (High quality print) (modified)
     Standard: None
     Compatibility: Acrobat 5 (PDF 1.4)
     Optimize for fast web view
     Created tagged PDF
     View PDF after exporting
     Hyperlinks
In the past where I had no problem with people seeing the PDF, all PDFs were sent using Entourage.
Now I am testing the sending of them using Apple Mail. It gives me two choices: to "Send Windows Friendly Attachments" or not to check that off. I tried it both ways. I've also tried it with two different PDF files, one created in CS 3. Same results.
The reason I'm using Mail (or hope to) is that in Mail I can design the page so I can have text followed by a PDF followed by text. Whereas in Entourage the PDF always goes to the bottom of the page, the last item, which is what I do NOT want.
How can I solve the problem of the disappearing PDF files? Is the answer in the specs?
Thank yu.

Answer 1

stop trying to put the PDF into the body of the message. 90% of the email
users out there probably won't see it
That kinda leaves me high and dry. Maybe if I tell you what I am trying to
accomplish you will have a suggestion or -- something? -- .
I have email addresses for a number of writers' agents or producers etc.
Instead of the usual query letter, I have designed query pages, in InDesign,
for each of two screenplays. I want them to SEE the PDF of the page I am
attaching to the otherwise very brief email.
The desired format is
    Hello -- opening -- a line or two
    PDF big image or .png
    Good-bye -- closing -- name and address.
And I want them to see the PDF without having to open the attachment, which
most won't bother to do.
I have never before found that PDFs were not seen but that is now happening.
Is there a way, using either Entourage or Mail, to send RELIABLE PDFs?
Or:
Might it be better for me to take a screenshot of the page in InDesign and
might that be more universally useful (useful meaning, they see it)? Using
Command-Shift-4, it comes up, looking sharp enough, as a .png file. I also
have Grab. Would one of those be better?
Thank you. I really do want to solve this, not give up!