Tips for ensuring successful SMS delivery

Automations are the only method available to send SMS messages to your contacts with mobile phone numbers. To learn more about how to send an SMS message from an automation, please refer to this help document. In this article, we’ll share some quick tips to help ensure successful SMS delivery.

  • Keep your message as short as possible. SMS messages have a 160 character limit.
  • Avoid link shorteners such as Using will trigger an account review which will prevent your SMS messages from being sent. Unfortunately, this link shortening service is often used by spammers and can be blocked. Instead, we recommend using the full URL or another link shortening service, such as
  • Use the default ActiveCampaign phone field. Our system will only send to the default phone number field. It will not send to a custom phone number field you may have created to collect mobile phone numbers for your contacts.
  • Phone numbers outside of the United States must use an international format. Mobile phone numbers you collect from your contacts outside of the United States must be inputted into ActiveCampaign using an “+” symbol and country calling code, followed by full phone number. For example, if you have a contact located in Australia, you would format their phone number to be: +61 123 456 789.  

    Click here for a list of country calling codes. 

    Mobile phone numbers collected for contacts within the United States do not need to be in an international format, however, you will need to include the full phone number including area code. For example, you would format the phone number to be 123 456 7890.

Note: Our system saves a mobile phone number exactly how it was submitted to us. We do not reformat the phone number. If you do not use an international format for contacts located outside of the United States, our SMS provider will default to add +1 (US).

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