SMS Compliance in 2026: A2P, 10DLC, TCPA — What You Need to Know

Sending SMS in the US has gotten more regulated, and for good reason. Spam, phishing, and robocalls have made carriers and regulators crack down hard. If you are sending text messages for any business purpose, here is what you need to know in 2026.

A2P 10DLC registration

A2P (Application-to-Person) messaging on 10-digit long codes (10DLC) now requires registration with carriers. You need to register your brand (company) and campaign (use case) through a Campaign Registry (TCR). Unregistered traffic gets throttled or blocked.

mail2txt.io handles this for you. We are fully A2P 10DLC registered with all major US carriers. Your messages go through our registered messaging profiles, so you never have to worry about registration.

TCPA compliance

The Telephone Consumer Protection Act (TCPA) requires prior express consent before sending SMS to consumers. This means:

• The recipient must opt in to receive messages
• You must disclose message frequency and data rates
• You must honor STOP requests immediately
• You must provide HELP information on request

mail2txt.io enforces all of these requirements automatically. Users must verify phone ownership, STOP/HELP keywords are handled instantly, and consent is tracked per-recipient.

What mail2txt.io does for you

• Full A2P 10DLC registration with all US carriers
• Automatic STOP/HELP keyword handling
• Phone ownership verification via SMS code
• Per-recipient consent tracking
• Quiet hours enforcement
• Per-phone rate limiting (prevents abuse)
• Fraud and phishing detection

Get compliant in 30 seconds

Instead of navigating the compliance maze yourself, sign up for mail2txt.io and let us handle it. You focus on what matters — we handle the regulatory work.