How to Prevent SMS Filtering by Carriers: Error 30007

Carrier filtering (Error 30007) occurs when messages are blocked because they appear to be unwanted, spammy, or non-compliant with carrier or legal policies. This article will help you understand what message filtering is, how to avoid it, and what you can do if you’re affected.

What is Error 30007 – Carrier Filtering?

30007 is a carrier-side error that indicates your message was filtered due to content, sender identity, or compliance reasons.

This happens when a message:

• Violates a carrier’s messaging policy.
• Appears similar to spam or illegal traffic.
• Is missing required compliance elements, like opt-in consent or sender identification.

These filters are enforced to protect consumers, comply with national regulations (like A2P 10DLC in the U.S.), and maintain platform trust.

If you want more information on message filtering, check out this article: How Does Message Filtering Work?

While this notification is in no way a change to the policies put forth by carriers, the CTIA, and Adaptive AI Phone, it is a reminder of what is and what is not acceptable within the North American messaging community.

We have been told by our carrier partners that there will be greater enforcement of messaging policies, and we expect to see increased filtering of the following:

• Traffic, as identified by increasing customer complaints, that shows evidence of not gaining appropriate opt-in.
• Informational and promotional traffic failing to have a clear description of how to opt-out, meaning STOP language is not clearly shown to the end user.

How to Prevent Messages from Being Filtered

Below are structured guidelines based on carrier requirements, the platform’s policies, and industry best practices.

• Only message users who’ve.
• Your message must and.
• You must if you message the same contact regularly.
• Avoid creative variations like “ ” – these are and will be filtered.
• to avoid accidental messaging of recycled numbers.
• – carriers will begin filtering traffic that shows abuse patterns.
• such as payday loans, debt relief, cannabis, etc. Check out our guide on.
• Do not “ ” across multiple numbers to evade filtering – use numbers based on geography or business units only.
• Use pre-registered short codes or Alphanumeric Sender IDs where required, especially for countries like France.
• Refer to for local rules.
• Avoid public (like Bitly, TinyURL). like (yourbusiness.com/offer).
• Never use or.
• Use and avoid:
• Do not send or, or anything listed in the Forbidden Categories link above.

Your SMS must:

• Contain instructions (at least monthly).
• Clearly.
• Be sent only to users who gave explicit permission.
• Process – deactivated numbers are no longer valid recipients.
• A message triggering 30007 can mark a contact as DND automatically.

DoNotDisturb (DND Split)

Best Practices

• Use custom or branded short URLs linked to your business domain.
• Limit redirects to no more than one, and avoid cloaking link destinations.
• When possible, include the full URL to boost transparency (even if it takes extra characters).
• Improving your URL practices can prevent filtering and ensure your messages reach their audience.
• If sending links through SMS, only use links provided in their A2P.
• Links will need to have that specific domain address when they send SMS, or else it could be filtered.

U.S. Messaging Policy & Guidelines Enforcement to Ensure Higher Deliverability

Think You’re Being Filtered by Mistake? If your messages meet all compliance criteria but are still blocked:

1. 1Gather from the.
2. 2Share the for review.

Go to Conversations from your sub-account.

Use the Search bar to find the affected contact by Name or Number.

Click on the Contact Image to open contact details.

Copy the browser URL, which will look like:

Frequently Asked Questions