An Alphanumeric Sender ID allows you to set a custom word, such as the name of your brand or business, as the Sender ID when sending one-way messages.
When using an Alphanumeric Sender ID (Custom Word), you must ensure that:
Your Sender ID is no longer than 11 alphanumeric characters*
Only (a-z) and (0-9) characters are used
Any full stops or spaces are removed
* Some countries limit this character limit even further.
Note: Some carriers will reject Alphanumeric or Numeric Sender IDs. Please try changing to either a number or a text Sender ID to see if the problem is resolved.