Are there emailing sending limits for Google Apps/TigerMail/FacultyStaff email?
Yes - Google has specific limits on the number of emails that can be sent per day. Those limits are detailed at this website:
http://support.google.com/a/bin/answer.py?hl=en&answer=166852
Helpdesk
http://support.google.com/a/bin/answer.py?hl=en&answer=166852
Helpdesk