How do I prevent messages from being filtered by carriers?

Last updated: November 5, 2026

Reduce carrier filtering by sending clear, compliant SMS messages only to opted-in contacts and avoiding spam-like content.

Steps

  1. Identify yourself in the first message, such as “Hi, this is [Name] from [Company].”

  2. Use clear, concise copy.

  3. Avoid excessive capitalization, punctuation, symbols, and emojis.

  4. Avoid promotional or restricted content that may look like spam.

  5. Include opt-out instructions such as “Reply STOP to unsubscribe” when appropriate.

  6. Only message contacts who have consented to receive SMS.

  7. Keep messages short to reduce segmentation and filtering risk.

Tips

  • Personalize messages so they feel relevant and expected.

  • Avoid sending identical messages repeatedly to large lists.

  • Keep opt-in and opt-out processes documented.

  • Review campaign copy before sending at volume.

Troubleshooting

  • If messages are repeatedly filtered, shorten and rewrite the message.

  • If contacts report non-delivery, confirm opt-in status and adjust copy.

  • If a number appears carrier-flagged, contact Whippy Support for review.