📥 Overview
We’ve made message sending smarter by automatically catching issues that would cause messages to fail - before they’re sent.
Whether it’s a landline, an opted-out contact, or an invalid number, we’ll now give you instant, helpful feedback so you can take action (and save credits).
📊 What’s New?
Checks for known issues before sending
We now catch messages that would have failed due to these common reasons:
21610
– Contact opted out (replied STOP)
21635
,
30006
– Landline numbers that can't receive SMS
21211
,
21614
– Invalid or non-mobile numbers
21661
– Your number isn’t SMS-capable
30034
– A2P registration not yet completed
21408
– Region restrictions on sending
...and more
✅ Instant, clear feedback in the app
When a message can’t be sent for one of these reasons, you’ll now see a clear explanation — not just a cryptic error code.
✅ Smart DND tagging to protect your list
We now help you automatically manage contacts that can’t be messaged:
Permanent DND
is applied when a number is known to be
unreachable long-term,
such as:
  • Replied STOP (
    21610
    )
  • Landline (
    21635
    ,
    30006
    )
  • Invalid or non-mobile number (
    21211
    ,
    21614
    )
Temporary
DND is used when the issue might resolve soon, like:
  • Phone switched off or unreachable temporarily
  • Carrier-specific delivery issues
This ensures your messages go only to reachable contacts — without you needing to monitor everything manually.
🔍 Why This Helps You
📈 Boost message deliverability
💸 Save credits by avoiding known failures
💬 Understand issues right away (no more guesswork)
🙌 Run smoother campaigns with cleaner contact lists
📌 Good to Know
  • Already live — no action needed
  • Works across Conversations, Campaigns, Bulk Messaging, and Workflows
  • Only messages with guaranteed delivery issues are held back; all others will send as usual
💬 Need help or have questions?
Our Support Team is always here for you! If you’re unsure why a message wasn’t sent or want help optimizing your contact lists, just reach out — we’re happy to help.