PDF Attachment is mangled

Sending basic email to gmail and icloud is working, however, when adding a 16 page PDF file attachment to the message the PDF received is not identical to the originating PDF.

Comparing the sent file to the downloaded received file, both have the same file size.

Opening the downloaded received file in Adobe Acrobat Reader I received the following two (2) messages:
1. Cannot extract the embedded font 'URZYZB+TimesNewRomanPSMT'. Some characters may not display or print correctly.

Clicking OK in the msgbox I receive the following message:
2. An error exists on this page. Acrobat may not display the page correctly. Please contact the person who created the PDF document to correct the problem.

Reviewing the received file one quickly notices that the files have substantive issues/gaps.
The sent file opens properly.

Start by reproducing the reported case: send the 16-page PDF as an attachment through ezgmail, download the received file, and compare it with the original in Acrobat Reader. Done means the received PDF is identical to the originating file and opens without font or page errors; the issue names no source file or test to inspect.

Written by the indexing model from the issue text.