Resolution

Option 1

Split up the workbook into two separate, smaller workbooks. Users can then subscribe to both workbooks and receive the images in two smaller emails.

Option 2

Instead of using the built-in subscription email feature, use the "tabcmd" functionality to export a full PDF of the workbook and then email the PDF to the desired list of recipients using the mail program of your choice. This can be scripted to run automatically using Windows Task Scheduler. For an example, see the following Knowledge Base article: Tabcmd for Generating a PDF of a Tableau View and Emailing. 

Note that the example in the above article is written using "tabcmd get" to fetch just one view from the workbook. If you want to include all of the views in a workbook, use "tabcmd export" instead. Here's an example:

tabcmd export "AnalyzeSuperstore/Overview" --fullpdf -f "PDFexport.pdf"

"AnalyzeSuperstore" is the workbook name and "Overview" is the name of one of the views. Even though you're exporting the whole workbook, you still need to include the name of one of the views here for the command to work.

For more information about tabcmd, especially "tabcmd export", see: tabcmd Commandsexport in Tableau Help. 

Cause