[slater]

Likely it's to cut down on scams. Does the error also happen when you send the text message with, say, "Verizon" tacked on the end? Or somewhere in the middle of the sentence?

[another_comment]

This does not get rejected: "(Error: 30007) Carrier violation. Your message content was flagged as going against carrier guidelines. Verizon"

[another_comment]

This gets rejected: "(Error: 30007) Carrier violation. Your message content was flagged as going against Verizon carrier guidelines."

[another_comment]

This gets rejected: "(Error: 30007) Verizon Carrier violation. Your message content was flagged as going against carrier guidelines."