Violating the below requirements puts organizations' messages at greater risk of being blocked by the carriers' "spam" filters. The carriers' filtering methods are not standardized or transparent. The rules below are not an exhaustive list and may change. Please consult your legal counsel before beginning a messaging program.
Include Opt-Out language in your Initial Outbound (IOB) message. U.S. cell phone carriers prefer that organizations give their contacts clear instructions on opting out in the first message. The IOB should end with the phrase "Reply STOP to Opt-Out" or similar opt-out instructions.
Keep Initial Messages Short! Do not exceed 306 characters, which equates to two segments of text with most carriers. Use clear and simple language. Don't include repetitive phrasing.
A character counter will appear underneath the IOB message in the program admin to help you control the length of your IOB. The platform will not limit the content in an IOB message.
Do not use links in the Initial Outbound message (IOB). There is a greater probability that carriers will not deliver an IOB message that includes a link.
To share a link with a message recipient, we recommend using links in replies to those who respond to the IOB with a "yes" response - they're interested! If you do include a link in your IOB script, you'll receive a warning message recommending that you remove it.