SMS Deliverability Guide

Sending isn't the same as delivering. Here's how to ensure your messages arrive.

What Affects Deliverability

• Carrier filtering - Spam detection

• Number reputation - Your sending history

• Content - What you're saying

• Compliance - A2P registration status

Content Best Practices

Avoid Spam Triggers

• Don't use ALL CAPS excessively

• Limit special characters

• Avoid "FREE" in all caps

• Don't include URL shorteners from public services

Include Required Elements

• Business name identification

• Opt-out instructions

• Clear call-to-action

Technical Requirements

• A2P 10DLC registration - Required for business texting

• Proper throughput - Don't exceed your limits

• Clean lists - Remove invalid numbers regularly

Monitoring Deliverability

Track these metrics:

• Delivery rate (target: 97%+)

• Error codes by type

• Carrier-specific issues

Hermes optimizes deliverability automatically. Learn more →