If you’ve tried to set up SMS marketing for an online casino, sportsbook, sweepstakes platform, or poker room using a mainstream provider, you already know what happens next: your account gets flagged, your campaign gets rejected, or your messages quietly stop delivering.
This isn’t a configuration problem. It’s policy — and it’s enforced at the carrier level. Mainstream platforms explicitly prohibit gambling content under their acceptable use policies and have no infrastructure to route it legally through US carriers. Delivyr exists because the iGaming industry deserves a purpose-built SMS platform that doesn’t treat regulated gaming operators like a liability.
Why Mainstream SMS Platforms Won’t Touch iGaming
The rejections aren’t arbitrary. They trace back to a structural reality of how business SMS works in the United States.
The 10DLC Problem
A2P 10DLC is the framework US mobile carriers — AT&T, T-Mobile, and Verizon — use to separate legitimate business messaging from spam. Businesses must register their identity and intended message types with The Campaign Registry (TCR) before carriers allow traffic through.
TCR’s framework includes a Special Use Case category that covers sweepstakes and gambling content. On paper, a pathway exists. In practice, Special Use Cases require carrier-level vetting and approval, and most general-purpose SMS platforms won’t submit gambling registrations at all — their Acceptable Use Policies prohibit the content before it ever reaches a carrier review.
As of February 1, 2025, all major US carriers block 100% of SMS and MMS traffic from unregistered 10DLC numbers. There’s no throttling, no warnings — unregistered messages simply don’t deliver.
The upshot: gambling traffic has a legitimate registration pathway, but it requires a platform willing to navigate the carrier vetting process, maintain the relationships to keep approvals active, and absorb the compliance overhead. Most platforms aren’t. Delivyr is built specifically to operate within this pathway, with the vetting, carrier relationships, and age-gating infrastructure regulated gaming content requires.
What the Named Platforms Actually Say
This isn’t a technical edge case. The major platforms document these restrictions explicitly:
Twilio publishes a dedicated error code — 30461 — that reads: “The toll-free phone number cannot be verified because the submission indicated a forbidden messaging category (Gambling). Gambling traffic is prohibited in the US and Canada on all number types (Toll Free, Short Code, Long Code).”
Klaviyo’s Acceptable Use Policy explicitly lists “gambling services or products, including but not limited to online poker, casino games, lotteries, college and pro sporting events and betting tips” as prohibited content.
Certain content is also prohibited for Klaviyo SMS, such as gambling or SHAFT — sex, hate, alcohol, firearms, and tobacco. Email and SMS consent are separate, so operators must collect each individually.
Attentive and Postscript are both built for e-commerce retention. Their compliance stacks are designed for apparel and DTC brands, not age-verified, regulated-content industries. Neither has SHAFT-compliant routing infrastructure or the legal framework to support gambling content in states where it’s licensed.
The conclusion is straightforward: if your brand operates in iGaming, these platforms aren’t an option. They won’t serve you at account opening, and even if you get through onboarding, carrier filtering will kill deliverability at scale.
What Delivyr Does Differently
Delivyr is an SMS and MMS delivery platform purpose-built for regulated and restricted verticals — including the gaming industries mainstream platforms won’t serve.
SHAFT-Compliant Routing
“SHAFT-compliant” is often used loosely. Delivyr’s routing infrastructure is built specifically to handle content that touches SHAFT categories — including iGaming, gambling, hemp, and alcohol — with carrier relationships and routing paths that keep these message types separate from general commercial traffic. This isn’t a workaround; it’s the correct technical architecture for this content type.
Deliverability Built for High-Volume Gaming Campaigns
SMS has a response rate of 45%, compared to email’s 6%, and 98% of text messages are opened and read.
Those numbers only hold up if your messages actually deliver. Operators running reactivation campaigns, deposit bonus alerts, or live betting push notifications need throughput and deliverability that matches the pace of the industry — not the throughput of a shared long code pool throttled at a few messages per second.
10DLC Registration for iGaming
Most SMS platforms route gambling traffic through toll-free numbers because they can’t support it on 10DLC. Delivyr registers iGaming operators directly through The Campaign Registry — the same pathway carriers designed for regulated content, just one that requires the legal and technical vetting most platforms won’t invest in. Operators get 10DLC’s throughput and brand recognition without the short-code price tag.
Carrier Relationships Built for Restricted Verticals
Carrier filtering tightens every year. When AT&T or T-Mobile changes a rule — as they did in February 2025 when all major US carriers began blocking traffic from unregistered 10DLC numbers — operators on general-purpose platforms find out when their delivery rates crater. Delivyr’s carrier relationships are maintained specifically for iGaming, sweepstakes, and other restricted verticals, which means rule changes are surfaced and addressed before they kill a campaign.
Two Ways to Send: Integrate With Your Stack
Delivyr isn’t asking operators to rip and replace their tech stack — but we’re also not forcing you into one if you don’t have it yet. Operators choose the path that fits their infrastructure:
- Integrate with your existing CRM. Delivyr connects to the lifecycle and CRM tools iGaming teams already run — Optimove, Customer.io, Smartico, and others — and handles the last-mile compliance and delivery layer that those platforms can’t. Your segmentation, journey builders, and player data stay where they are. Only the send layer changes.
- Use Delivyr’s standalone campaign builder. For operators without a dedicated CRM, or teams running SMS independently of their broader stack, Delivyr includes a native campaign builder with audience segmentation, scheduling, and reporting built in. Launch campaigns directly from the platform with the same compliant infrastructure powering the integrations.
Either way, the delivery layer is the same: SHAFT-compliant routing, registered 10DLC numbers, and carrier relationships maintained for regulated gaming.
SMS Use Cases by iGaming Sub-Vertical
Every iGaming vertical has different player behavior, different regulatory requirements, and different high-value moments to capture. Here’s how Delivyr powers each one.
Online Casino SMS Marketing
Online casino operators have the highest player LTV potential in the iGaming space — and the highest churn risk. Players go dormant, bonuses expire unclaimed, and jackpot moments pass without notice.
High-value use cases for online casino SMS:
- Deposit match activation: A triggered message immediately after sign-up prompting the player to claim their first deposit bonus before it expires converts at rates email cannot match.
65% of SMS-driven buyers purchased sooner than planned, and 14% made a purchase they weren’t planning due to an SMS.
- Jackpot and milestone alerts: Real-time notifications about progressive jackpot thresholds or game-specific milestones create urgency and drive sessions.
- Lapsed player reactivation: A segmented win-back campaign targeting players inactive for 30, 60, or 90 days with personalized bonus offers.
- VIP tier upgrades: Automated notifications when a player approaches or crosses a tier threshold — these messages have extremely high open rates because they’re personally relevant.
Sports Betting SMS Platform
Sports betting operates on a timeline that no other iGaming vertical matches. The window between when a line moves and when a game starts can be minutes. SMS is the only channel fast enough to be useful.
High-value use cases for sports betting SMS:
- In-game line alerts: Push notifications on odds movement for markets a player has previously bet or shown interest in — relevant, timely, and click-worthy.
- Event day reminders: Game-day messages with a direct link to the betting interface for scheduled events players have wagered on previously.
- Deposit and balance reminders before major events: Triggered messages before the Super Bowl, March Madness, or UFC cards reminding players with low balances that a deposit match is available.
- Responsible gaming prompts: State-licensed sportsbooks have responsible gaming messaging obligations. SMS is a high-visibility channel to deliver these, and Delivyr’s platform handles compliant opt-out and limit-setting message flows.
The average person touches their mobile phone more than 2,600 times a day, and more and more people are using mobile devices to gamble — making SMS marketing the ideal tool for the sports betting industry, with an open rate of 98% within three minutes of send.
Sweepstakes Casino SMS Marketing
Sweepstakes casinos occupy a unique legal position — they operate under a sweepstakes model that sidesteps gambling regulations, but they’re still restricted from most mainstream SMS platforms due to their association with casino gaming and the dual-currency prize structure.
This creates a specific opportunity for Delivyr: sweepstakes operators often have the clearest compliance posture in the gaming space (no real money wagering), but the same platform access problems as fully licensed online casinos. Delivyr solves this without requiring sweepstakes operators to over-engineer their compliance narrative.
High-value use cases for sweepstakes SMS:
- Free coin / sweeps cash promotions: Limited-time free-to-play credit offers sent via SMS to drive DAU during off-peak periods.
- Promotional contest alerts: Notifications about upcoming sweepstakes drawings and prize pool sizes.
- KYC completion prompts: Sweepstakes platforms often struggle with completion rates on identity verification. A triggered SMS to users who started but didn’t finish KYC significantly improves conversion.
Social Casino SMS Marketing
Social casino apps — free-to-play mobile casino games without real-money prizes — have massive player bases but face steep churn curves. The average social casino player’s activity window is narrow, and re-engagement timing is everything.
High-value use cases for social casino SMS:
- Daily bonus reminders: Players who haven’t logged in to claim their daily chip bonus represent immediate re-engagement potential. A triggered SMS with a deep link directly into the app converts dormant users at measurable rates.
- Feature and game launch announcements: New slot title launches or live event modes drive session spikes when promoted via SMS to segmented player groups.
- Referral program activation: Social casino player networks are valuable. Triggered SMS messages promoting a refer-a-friend bonus tap into existing players to drive low-cost acquisition.
Online Poker SMS Platform
Online poker has unique engagement patterns: tournament schedules, satellite event qualification windows, and VIP grind milestones are all moments where SMS dramatically outperforms email in time-sensitivity.
High-value use cases for online poker SMS:
- Tournament registration reminders: A reminder message 60 minutes before a tournament’s late registration window closes is a direct revenue trigger.
- Satellite qualifier alerts: Notifications about upcoming satellite events for major tournament series (WSOP, WPT) to players who have expressed interest.
- Bad beat jackpot alerts: When a progressive jackpot threshold is hit, an SMS blast to your active player base drives immediate table traffic.
- Reload bonus alerts: Poker players are highly bonus-sensitive. Personalized reload offers sent via SMS timed to lapsed activity windows drive deposit rates.
The Delivyr Difference: Purpose-Built, Not Patched
Most SMS platforms serving iGaming today fall into one of two buckets: international providers with no US carrier relationships, or generic platforms that theoretically allow gambling content but provide no infrastructure support, compliance guidance, or gaming-specific deliverability optimization.
Delivyr is neither. It was built from the ground up for operators in regulated and restricted industries — with the carrier relationships, number types, routing architecture, and compliance tooling to serve iGaming at scale.
Frequently Asked Questions
Can online casinos use SMS marketing?
Yes — but not through mainstream platforms. Online casinos can legally use SMS marketing in states where they hold a valid gaming license, provided they obtain explicit opt-in consent from subscribers, implement age-gating to verify players are 21+, include compliant opt-out mechanisms, and route messages through infrastructure approved for gambling content.
Standard platforms like Twilio explicitly prohibit gambling traffic across all US number types, including toll-free, short code, and long code. Klaviyo’s Acceptable Use Policy prohibits gambling services including online poker, casino games, lotteries, and sports betting content.
Online casinos need a dedicated iGaming SMS provider — like Delivyr — specializing in the high-trust vetting required to unlock 10DLC specifically for regulated gaming.
What SMS platforms allow gambling?
Almost no mainstream “self-service” platforms allow gambling content in the United States.
While it isn’t prohibited by the carriers themselves, it is omitted from the standard, automated registration APIs used by Twilio, Klaviyo, and others.
Delivyr provides the specialized legal and technical vetting required to register these 10DLC routes officially through The Campaign Registry (TCR).
Why do mainstream SMS providers block gambling?
The blocking is driven by carrier policy, not platform preference.
The three major US mobile carriers — AT&T, T-Mobile, and Verizon — created The Campaign Registry (TCR) to verify business identity and message type before allowing traffic through.
Since February 2025, all major US carriers block SMS and MMS traffic from unregistered 10DLC numbers entirely.
Platforms like Twilio and Attentive have built their systems for “standard” retail commerce. They lack the specialized age-gating integrations and the specific carrier relationships needed to support regulated gaming, so they prohibit it entirely to avoid the compliance headache.
This is why we started Delivyr – to provide purpose build SMS infrastructure for iGaming, Sweepstakes, Social Casinos, and more.
Is SMS marketing legal for sports betting operators?
In the US, the landscape is state-dependent and evolving quickly. While many states permit SMS for gambling, new 2026 legislation is raising the bar for consumer protection. To stay compliant and ensure high deliverability, operators must navigate the A2P 10DLC requirements, which include:
- Documented opt-in consent before any promotional messages are sent
- Age verification (21+) for all subscribers
- STOP/HELP keyword compliance and immediate opt-out processing
- Quiet hours compliance (no messages before 8AM or after 9PM in the recipient’s time zone)
- Responsible gaming disclosures in onboarding flows
Delivyr’s platform handles these requirements at the infrastructure level, so operators aren’t building custom compliance logic on a generic stack. We allow gaming operators to focus on what they do best while we handle the 10DLC compliance logic
What’s the advantage of 10DLC for iGaming?
A 10-digit long code (10DLC) is a standard phone number that allows for a more personalized, “human” feel compared to a generic 5-digit short code. Historically, carriers only allowed gambling on expensive short codes.
However, Delivyr’s specialized routing allows iGaming brands to leverage 10DLC numbers for the first time. This offers better brand recognition and a lower barrier to entry while maintaining the same high deliverability and throughput once reserved for short codes.
Does Delivyr support MMS for casino marketing?
Yes. Delivyr supports both SMS and MMS delivery for iGaming operators. MMS allows operators to include images, GIFs, and rich media in player communications — useful for jackpot announcements, game launch visuals, promotional creative, and tournament bracket graphics. MMS messaging for gambling content faces the same carrier restrictions as SMS, so it requires the same gaming-approved infrastructure Delivyr provides.
Ready to Run SMS Campaigns Your Current Platform Won’t Touch?
If you’ve been locked out of SMS by Twilio’s gambling ban, rejected by Klaviyo’s AUP, or watching your messages disappear into carrier filters — you’re not doing anything wrong. The system isn’t built for you. Delivyr is.
We serve online casinos, sportsbooks, sweepstakes platforms, social casino apps, online poker rooms, and other gaming operators who need SMS that actually delivers.
See how gaming operators are using Delivyr for player reactivation, deposit bonus campaigns, tournament alerts, and VIP engagement — on infrastructure purpose-built for restricted verticals.
*Currently only serving gaming companies based outside the United States.
