Postie Plugin

Hi like all other posts I should start with words like newbie, no programmer, etc. and the a BIG please can someone help me!

So here is the problem. I installed the postie plugin. 1.6.14 WordPress updated to the latest.
Postie:
Works just fine with text, and images.
No go with adding PDF files.

School admin needs to upload information to parents daily sending an e-mail and attachment in PDF. This needs to be done in various categories, so that function should also be working.
Maybe my e-mail format is wrong? Think my settings are ok, not so sure though.

Anyone have success with this way of sending e-mail posts to blog?
Thank you.
Mignon