Like email providers, mobile carriers use advanced filtering systems to protect their subscribers from unsolicited spam messages.  If you've found that many of your messages are not being delivered to your recipients, it's possible that your message, or your phone number as a whole, is being blocked by carriers. 

Here are a few questions that may help you identify and correct the issue:

  • Did the blocked message contain a link from a public URL shortener like or
    Since many spammers use URL shorteners in their text messages, carriers sometimes block messages that contain these links.Try using our built-in URL shortener instead, or include the full destination URL in your message.
  • Did you send messages to people who didn't specifically opt-in?
    If so, they may have reported your messages to their carrier as spam.  Carriers take these reports very seriously and will block your number if they receive an excessive amount of reports. 
  • Are you sending messages from a local number that hasn't been carrier-registered? 
    If so, please register your local texting number right away for the most reliable delivery rates.

If none of the above suggestions correct the issue, it's possible that your phone number has been blocked from sending messages at the carrier level.  In this case, please reach out and we'll be happy to work with the mobile carriers to get your number unblocked.