Is there a data cap for attachments when you distribute agendas and minutes via email?

There is a cap of 20MB.

If the attachments in your Agenda or Minutes exceed this cap, MeetingBooster will inform you that your attachments exceed the limit when you go to distribute them.
Exceeding 20MB Data Cap when Distributing Agenda  Exceeding 20MB Data Cap when Distributing Minutes

The Agenda/Minutes will still be distributed via email but the attachments will not be included in the PDF.