Plugins will allow you to do this, IE:
Otherwise the only native thing you can do is to perform an Applescript or batch file via send event to zip some contents into a single file. Not really easy, but possible. It's much easier to use a plugin, and you gain a ton more email features as well (IE reading IN emails, and sending HTML formatted emails).
The easiest way is to compress the set of files you want to send and then attach that compressed file via your FileMaker script. On a Mac you can easily make a single compressed file of multiple files directly in the OS; I'm not sure how it's done on Windows but I dare say there is a way.
Zipping is easy to do manually. Not so easy to do from FM (IE taking container fields contents from three records and sending via an attachment, or three PDFs of filemaker reports in a single email).
I was trying to avoid using plug-ins as the solution will run on iOS.
Anyway, e-mail plug-in will work fine on desktop computers.
My intention is to include a PDF with technical specifications of every product included in an order, so it has to be something dinamic.
The script should collect the PDF from the product record and include it into the e-mail.
Maybe I´ll ask for it as a new feature for FileMaker 14.
As an alternative, you can provide full path links to download these specs. Even though it's not HTML formatted email, most email apps will render links as hyperlinks if you use full path (usually begins with 'http').
-- sent from my iPhone4 --
It's already a feature many people have requested. The built in send mail script step is far less powerful than the plug-ins available.
As for your iOS conundrum, I would suggest either sending multiple emails, or finding a way (IE virtual listing) to fit all of your data on a single layout so a single PDF file can be generated. Remember, I believe append to existing PDF is still unsupported for Go as well.
Given the need you outline, Beverly has the correct answer, in my opinion.
With a little strategy the links can be created on the fly and adds the benefit of the user being able to forward the links to appropriate co-workers and/or fetch the spec sheets when she gets back to her desk.