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 beyond those in our Acceptable Use Policy
Other features/restrictions of note:
Handset delivery receipts are supported.