Scan to Email Breaks into Multiple Messages?? Dell B2375dfw MFP

I thought I had found the appropriate setting in the Dell printer manager, but apparently not. Even when sending only 10 pages to Email, the Scan to Email function breaks it into 3 separate Email messages. We use Google Apps for Work, so Gmail is our Email. 

Any ideas on settings I can tweak to increase the file size limits on Scanning to Email? I don't have this issue if I scan to Google Drive, but that's not always the most efficient.

Thanks!