How to Fix SMS Error 30007: Carrier Filtering in Sparkforge

By Sparkforge Support Team ·Last reviewed May 3, 2026

Error 30007 means a US carrier filtered your message for content, sender identity, or compliance reasons. The fix is consistent opt-in, clear STOP language, an approved A2P 10DLC use case, branded URLs instead of public shorteners, and clean message content.

Error 30007 is a carrier-side filter, not a Sparkforge block. The carrier inspected your message and decided it looked like spam, violated US messaging policy, or was missing required compliance elements. The remedy is to clean up the conditions that triggered the filter so the next message goes through.

What Triggers 30007

The message violates a carrier messaging policy.
Content looks similar to known spam or illegal traffic.
Required compliance elements are missing — opt-in consent, sender identification, or STOP language.
The use case is not approved under A2P 10DLC.

How to Prevent Filtering

1. Consent and Opt-In

Only message contacts who explicitly opted in. Capture the opt-in source on the contact record.
Identify your business by name in the message body.
Include STOP language at least once every 30 days for any contact you message regularly. Conversational replies do not need STOP every time.
Reconfirm opt-in every 18 months to avoid messaging recycled numbers.
Use exact STOP language. Variations like Reply 2 to unsubscribe are non-compliant and will be filtered.
Watch your opt-out rate and complaint rate — sustained spikes draw carrier attention.

2. Use Case and Sender Selection

Avoid forbidden use cases — payday loans, debt relief, cannabis, gambling, and a small set of others. Sparkforge maintains a current list under Forbidden message categories for SMS and MMS in the US and Canada.
Do not snowshoe — splitting traffic across many numbers to dodge filters is detected and penalized. Use numbers based on geography or business unit.
For some countries (France, for example), use pre-registered short codes or alphanumeric sender IDs.

3. Message Content and Formatting

Use a branded short URL on your own domain (yourbusiness.com/offer) instead of public shorteners like Bitly or TinyURL.
Never use obfuscated links or chained redirects.
Avoid emoji-heavy messages, all-caps shouting, and excessive punctuation.
Spell-check the message. Misspellings and broken grammar are spam signals.

4. Opt-Out and Compliance Requirements

Every SMS campaign must include STOP instructions at least monthly, identify the sender, and only send to contacts who explicitly opted in. Sparkforge surfaces these checks on the campaign review screen — fix any warnings before sending.

5. Monitor Delivery

Open Conversations > Reports and review error rates after every send. If 30007 spikes, pause the campaign, audit consent records for the affected segment, and adjust the message body before relaunching.

If You're Already Affected

Pause any active SMS campaigns.
Review the message that triggered 30007 against the checklist above.
Confirm your A2P 10DLC brand and campaign registration in Settings > Phone Numbers > Trust Center.
Send a low-volume test to a known-good contact before resuming.

Frequently Asked Questions

Is error 30007 from Sparkforge or from the carrier?

From the carrier. Sparkforge passes the message to the carrier; the carrier inspects it and returns the filter response, which Sparkforge surfaces as 30007.

Will registering A2P 10DLC fix 30007 by itself?

Registration is required but not sufficient. Carriers also filter on content, opt-in patterns, and sender behavior. Clean those up alongside registration.

Are public link shorteners really filtered?

Yes. Bitly, TinyURL, and similar shorteners are heavily abused by spammers, so carriers filter them aggressively. Use a branded short link on a domain you own.

How often do I have to include STOP language?

At least once every 30 days for any contact you message regularly. Conversational replies do not require STOP language each time.