---
title: "Error 30007 – Message Delivery"
description: "Error code 30007 (“Message Delivery - Carrier Violation”) means your SMS was blocked by either Twilio or the recipient’s carrier due to content or policy violations."
url: https://support.agentsuite.ai/en/articles/288-error-30007-message-delivery
collection: "Phone System"
updated: 2026-11-05
language: en
---

# Error 30007 – Message Delivery

Error code 30007 (“Message Delivery - Carrier Violation”) means your SMS was blocked by either Twilio or the recipient’s carrier due to content or policy violations.

## Why Does Error 30007 Happen?

Error 30007 means your SMS message was blocked or filtered by the carrier.

**Common reasons:**

-   Sending SMS without the recipient's consent (opt-in).
    
-   Messages that look like spam or contain suspicious links.
    
-   Sending too many similar messages within a short period.
    

## How to Prevent Future SMS Issues or Suspensions

Follow these best practices to help prevent your messages from being blocked:

**1\. Include Opt-Out Instructions**

Add “Reply STOP to unsubscribe” in your first SMS to let recipients know how to stop receiving messages.

**2\. Identify Your Business**

Introduce yourself or your business in the first message so recipients know who is contacting them.

**3\. Avoid Messaging Numbers That Cannot Receive SMS**

Avoid sending messages to landlines or numbers that cannot receive text messages. Use Number Intelligence to identify these numbers and temporarily apply DND when needed.

**4\. Avoid Public URL Shorteners**

Avoid using public link shorteners like Bitly or TinyURL, as carriers may flag them as suspicious. Instead, use links from your own business domain and avoid unnecessary redirects.

**5\. Get Proper Consent Before Sending SMS**

Make sure contacts have agreed to receive text messages from your business before adding them to your workflows. Keep records of consent in case Twilio requests proof of opt-in.

**Important Reminder:** Following these practices can help reduce SMS delivery issues and the risk of carrier filtering or campaign suspension. However, they do not guarantee that every message will be delivered.

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