Overview
Certain file extensions have been blocked from being sent by Google due to security concerns. Files also cannot exceed 25MB in size and you will be prompted to upload it to Google Drive instead.
The list of blocked file extensions can be found on Google's support page below
https://support.google.com/mail/answer/6590?hl=en
If you are having trouble, or have any questions, please give us a call at x1212 or 1-800-322-3984 and we can assist you further.