The guidance below reflects general best practices for high-volume messaging programs. It is not comprehensive, and following these recommendations does not guarantee specific deliverability or compliance outcomes. These insights are based on our operational experience and industry observations, not official carrier or regulatory directives. They are provided for informational purposes only and do not constitute legal advice. Organizations should consult their legal counsel and messaging providers to ensure compliance with applicable laws, carrier policies, and program requirements.
1. Provide clear context for the outreach.
When sending high-volume messaging, it’s important to introduce yourself in a way that feels familiar and to reference the specific action the consumer took to prompt the message—for example, filling out a form requesting mortgage information. Referencing the original inquiry reminds the consumer that they requested this contact, which significantly reduces opt-outs and spam complaints.
This context is critical. Messages that feel unexpected are far more likely to be flagged, ignored, or reported.
Of course, this only works if your lead provider properly collects consumer opt-in and sets the expectation that follow-up communication will occur. Clear consent and proper expectation-setting are foundational to both compliance and long-term deliverability.
2. Keep messaging simple and authentic.
High-performing campaigns avoid heavy sales language or detailed value propositions in the first touch. Instead, the goal is simply to connect with someone who has already expressed interest. Messages are short, conversational, and focused on helping the consumer move forward with their request.
If someone has already inquired about a loan, they don’t need to be sold — they need to be guided through the next steps.
The highest-performing messages often feel like natural follow-up communication, not marketing copy.
3. Avoid sales-heavy structure and tone.
Deliverability issues often stem not just from specific trigger words, but from the overall tone and structure of the message. Carrier filtering systems analyze patterns, sentiment, and structure — not just keywords.
Before sending a message, ask yourself: Would I respond to this if I received it?
For example:
- “Hey John, I’m just following up on the form you filled out requesting more information.”
- “Hey John, I’d love to reconnect if you have a minute for a quick call.”
These approaches consistently perform better than:
- “Hey John, have you seen the rates? I’m saving clients thousands with a refinance while helping them take cash out to pay down credit card debt. You can still do this, too, but you need to act fast.”
Messages that feel helpful and contextual outperform those that feel promotional or urgent.
4. Carefully warm up new phone numbers.
One of the most overlooked factors in high-volume messaging success is proper number warming.
Newly registered numbers do not yet have a messaging reputation with carriers. Sending high-volume broadcast traffic immediately — especially to lower-quality leads — increases the risk of filtering, throughput limitations, or carrier intervention.
High-performing teams follow a disciplined approach:
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Start with your best leads.
New numbers should initially be used only with high-intent, recently opted-in leads that are least likely to opt out or submit spam complaints.
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Ease into volume gradually.
Begin with lower daily volumes and scale up over time rather than launching large broadcast campaigns immediately.
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Prioritize peer-to-peer style messaging.
Early traffic should be conversational and personalized rather than blast-style messaging. This helps build positive engagement history under the number.
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Build engagement history first.
Positive reply rates, low opt-outs, and low complaint rates help establish a strong reputation profile with carriers.
Once a number has established clean traffic patterns and good engagement metrics, it can more safely support higher volumes and broader campaign use.
5. Follow TCPA, CTIA, and Carrier Codes of Conduct
Successful high-volume messaging requires a deep understanding of carrier expectations, compliance requirements, and reputation management. The most effective teams don’t try to work around these constraints — they learn how to operate effectively within them.
Attempting to “fight” carrier filtering systems is not a sustainable strategy. It leads to increased filtering, throughput limitations, or campaign disruption — both in the short term and over time.
Carriers deploy increasingly sophisticated AI-driven filtering systems that continuously analyze traffic patterns, engagement behavior, tone, structure, and complaint signals. These systems evolve daily. The long-term winners are those who adapt their messaging strategy to align with carrier rules and consumer expectations.
The goal isn’t to beat the system — it’s to build a strategy that performs exceptionally well inside the system.
When you embrace the guardrails and design your messaging accordingly, you create sustainable deliverability, stronger engagement, and scalable growth.
Key Messaging Compliance Guidelines:
To maximize deliverability and remain compliant with carrier and regulatory requirements, please keep the following best practices in mind:
1. Message Only Opted-In Consumers
Only contact individuals who have explicitly provided consent to receive communications from you. Proper opt-in is foundational to compliance and long-term deliverability.
2. Include Clear Opt-Out Language
Your first message to a new consumer must include clear opt-out instructions, such as:
“Reply STOP to opt out.”
You should also reintroduce opt-out language if you have not messaged that consumer for an extended period.
3. Clearly Identify Yourself
Each message should include clear branding. Identify:
- Who you are
- The company you represent
Consumers should immediately recognize why they are receiving the message and how it relates to their prior interaction.
4. Avoid Carrier-Restricted Content
Mobile carriers actively filter certain categories of content. Messages containing restricted terms may be heavily filtered or blocked entirely.
For those in the mortgage industry, avoid language related to:
- Debt consolidation
- Third-party mortgage loans
- Debt reduction
- Short-term, high-interest loans
Even if your services are legitimate, specific terminology in these categories can trigger carrier filtering systems.
6. Timing is Everything
Timing & Quiet Hours
- Honor TCPA and state quiet hour rules. Using the recipient’s local time, message between 8:00 a.m. and 8:00 p.m.
Avoid “Crowd Times”
- Many automated campaigns hit at the top of the hour (9:00, 12:00, 5:00). Stagger your schedules to off-minutes (e.g., 10:17, 1:43, 5:06), so they don't all start at the same time. This reduces the risk of carrier throttling.
Test by Daypart—Let Data Decide
- Some campaigns perform better at different times of day. Start with three dayparts: morning (8–10 a.m.), midday (11 a.m.–2 p.m.), late day (4–6 p.m.) in the recipient’s local time. A/B-test the same template across these time windows for 2 weeks. Keep the top performer per campaign type.
7. Additional Resources
We strongly recommend you read further through the following Bonzo support articles:
- Terms and Phrases to Avoid for Better Messaging
- How to Troubleshoot Message Blocking Due to Carrier Content Filtering
You should also review carrier-published guidelines directly:
Understanding and working within these requirements is critical. Carriers use increasingly sophisticated filtering systems, and long-term success depends on aligning your messaging strategy with their standards rather than trying to work around them.