If you use your SenderID to send critical notifications and activation OTP/codes and need them to be delivered to everyone even Blacklisted/DND numbers, then you must apply for whitelisting your Sender ID.
Prepare a request with your company letterhead and send it to us with company license and civil id, we will take care of the rest. (Example Letter)
+ Is it possible to change my account number?
+ What is the minimum order quantity?
+ How to add OTP messages to my App or website?