How to Improve Message Deliverability?

Edited

πŸ“ˆ How to Improve SMS Deliverability with 10DLC A2P Messaging

If your messages are getting stuck in limbo (or worse β€” filtered out), you’re not alone 😩. Even fully approved 10DLC campaigns can suffer from low deliverability depending on the messages going out.

Let’s fix that.

Here’s how to ensure your texts actually reach your audience πŸ‘‡


βœ… 1. Choose the Right Campaign Type

Your campaign type directly impacts your daily sending limits, and your limits impact how many messages get Delivered!

  • Low Volume Campaign – Best for under 2,000 messages/day

  • Standard Mixed Campaign – Ideal for scale: higher throughput, better for 100+ new contacts/day (and for multiple use cases)

  • Dedicated Campaigns – For specific use cases (alerts, customer care, etc.)

🧠 Pro Tip:
If your messages mix marketing + support + reminders β€” go with a Mixed Campaign to avoid β€œdrift content” flags.


πŸ’¬ 2. Use Friendly, Non-Spammy Language

Avoid spammy language that forces a user to take an action

  • Phrases like β€œFree!!!”, β€œAct now”, β€œLimited stock”, β€œClick immediately”

βœ… Use helpful, direct language instead:

β€œHey {{name}}, your spot is ready. Tap here to claim it.”

Mind your words - swearing or including other foul language can also lead to delivery issues 🀭

Avoid SHAFT content

  • Sexual content, Harassment, Alcohol, Firearms, Tobacco


🧹 3. Keep Your Contact List Clean

Outdated, invalid, or purchased numbers damage your sender reputation.

  • Run lists through number validation tools

  • Check your list for land lines and invalid numbers; too many messages failing to land lines makes carriers think you are using a random number generator and don't have opt-in

  • Remove unsubscribed or inactive numbers

  • Don’t import unverified cold lists


🚦 4. Monitor Opt-Out Rates and Complaints

High opt-outs = red flags for carriers.

Stay under 3% opt-out rate by:

  • Sending only to engaged users

  • Avoiding repetitive or irrelevant messages

  • Getting consent! High opt outs are indicative of people NOT consenting; if you obtain proper consent, opt outs should be low πŸ“‰


πŸ”„ 5. Spread Out Your Outreach

Have that database of 10,000 people that you want to reach out to? We recommend NOT sending that all at once

It's likely that some of those customers no longer need your services, but if 10% opt out, it will look like non-consented messages to the carriers.

Instead? Mix it into your normal conversational messaging πŸ’‘


🚨 6. Understand Carrier Limits

Every carrier has caps:

  • T-Mobile: 2,000/day for low-volume campaigns

  • AT&T: 240/min for standard campaigns

  • Verizon: Varies by campaign vetting

🧠 Pro Tip:
Apply for vetting through Signal House to get increased throughput for your Standard Campaigns πŸš€


πŸ” 7. Track Your Campaign Health

Use the Signal House Analytics Dashboard to monitor:

  • Delivery Rate

  • Failure Rate

  • Clickthrough Rate

  • Unique Clicks

  • Message Queuing

Spot patterns and adjust your strategy before it’s too late.


Final Checklist βœ…

Area

Action

βœ… Campaign Type

Use Low-Volume or Standard Mixed wisely

βœ… Message Content

Avoid spammy terms, stay within use case

βœ… List Hygiene

Remove invalid or unengaged contacts

βœ… Spreading outreach

Spread cold outreach into your conversational messaging

βœ… Track Health

Review your Signal House analytics and dashboard to always know your messaging health!


Need Help?

πŸ“ž Contact the Signal House support team via chat or email
πŸ“˜ Or check out our Campaign Approval Bible PDF to master the setup!