SendingFailed for any message with "edd" in the body.

Issue Description:

I have tested and replicated an issue that occurs in both production and sandbox environments. Whenever a message contains the letters "edd" in any combination, the messageStatus returns as "SendingFailed".

For example, if the message contains "pretend edd", it will trigger an error. However, if the message contains "pretendedd", there won't be any issue.

To summarize, the issue occurs when the letters "edd" are used in isolation or separated by spaces between adjacent words, resulting in a "SendingFailed" status.