Check Score Impact
See how your Trust Score changes affect daily limits.
Understanding Throughput Throttling
Throughput drops manifest as message queues backing up, "Carrier Violation" errors, or messages taking hours to deliver. This is rarely a technical glitch; it is almost always an enforcement action by carriers based on your sending behavior or brand score.
Common Root Causes
Trust Score Decay
A drop in your Trust Score (e.g., from Low to Very Low) automatically reduces your daily message cap.
Active Filtering
Carriers detected spam-like content (e.g., shortened URLs, aggressive keywords) and are throttling delivery.
T-Mobile Daily Cap
You exceeded the T-Mobile daily limit for your brand tier (e.g., 2,000/day for Low Trust).
How to Restore Speed
Follow this protocol to identify the bottleneck and restore your throughput capacity.
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1
Check Trust Score
Log into your CSP or TCR portal. Did your score drop? If it's below 50, your limits have been severely cut.
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2
Audit Content
Run your recent messages through our validator. Remove public shorteners (bit.ly) and ALL-CAPS words that trigger filters.
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3
Request Re-Vetting
If your score is low, pay for Secondary Vetting ($40) to potentially boost your score and unlock higher tiers.
Throughput Tiers
Your daily capacity is directly tied to your Trust Score. Here are the standard T-Mobile tiers:
| Trust Score | Daily Message Cap | Throughput (TPM) |
|---|---|---|
| Low (0-24) | 2,000 / day | 15 TPM |
| Medium (25-49) | 10,000 / day | 60 TPM |
| High (50-74) | 40,000 / day | 240 TPM |
| Top (75-100) | 200,000 / day | 3,600+ TPM |
Prevention Strategy
Maintain high throughput by proactively managing your reputation.
Monitor Opt-Outs
Keep opt-out rates below 3%. High opt-outs signal spam to carriers.
Branded Links
Always use branded domains for links. Never use generic shorteners.
Consistent Volume
Avoid massive spikes. Ramp up volume gradually to "warm up" numbers.
Restore Your Speed
Don't let throttling kill your campaign ROI. Use our diagnostic suite to identify the bottleneck and fix it fast.
Frequently Asked Questions
Message Validator
Check for content that triggers filters.
Trust Score Sim
Predict your throughput tier.
Remediation Tool
Fix active blocks and rejections.
Legal Disclaimer: This content provides general troubleshooting guidance for SMS throughput issues and does not constitute legal advice. Throughput limits are determined by mobile carriers and The Campaign Registry based on Brand Trust Scores and vetting status. MyTCRPlus does not guarantee specific throughput rates.
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Frequently Asked Questions
Why did my SMS throughput suddenly drop without warning?
Sudden throughput drops are typically caused by: carrier-detected content policy violations triggering automated throttling, a trust score re-evaluation downgrade after a complaint spike, campaign volume anomalies flagged as potential snowshoeing behavior, or an expired carrier addenda requiring renewal. MyTCRPlus provides diagnostic tools to identify the specific carrier-side cause of throughput drops.
What is carrier-enforced SMS throttling and how does it affect message delivery?
Carrier throttling limits your messages per minute below your registered campaign throughput limit. T-Mobile, AT&T, and Verizon apply dynamic throttling based on complaint rates, content analysis, and volume anomalies. Throttled messages are queued or silently dropped — recipients never receive them. Throttling can affect delivery for hours to weeks depending on severity and whether the underlying trigger is resolved.
How do I diagnose the cause of a sudden 10DLC throughput drop?
Start by checking your TCR portal for trust score changes, campaign status updates, or new rejection codes. Review your message logs for content changes, volume spikes, or new URL domains introduced near the throughput drop date. Check carrier-specific reporting available through your messaging platform. MyTCRPlus's throughput drop diagnostic tool cross-references these signals to identify the root cause.
Can SMS throughput be restored after a carrier-imposed reduction?
Yes. Throughput restoration depends on the cause. Content violations require correcting prohibited message elements and allowing 24–72 hours for carrier filter recalibration. Trust score drops require remediation actions (DUNS verification, complaint reduction) and a re-evaluation cycle of 2–6 weeks. Volume anomaly flags typically resolve within 48–72 hours after returning to normal sending patterns.
Does a throughput drop affect all my registered campaigns or just specific ones?
Throttling can be applied at the campaign level (affecting only the specific campaign flagged) or the brand level (affecting all campaigns associated with the brand). Campaign-level throttling is the more common response to content violations. Brand-level throttling follows serious compliance failures such as SHAFT content detection or fraudulent registration information. Monitoring each campaign's throughput independently is essential for early detection.