Orange Madagascar (64602) is filtering heavily on Sender ID. Alphanumeric Senders will be blocked and also some Numeric in International format such as: 47xxxxxx, 44xxxxxxxx, 22xxxxxx and most likely other senders as well.
We recommend to always test before switching live traffic.
There are no additional content restrictions.
Other features/restrictions of note:
Handset delivery receipts are supported.