Smarter Message Sending: Say Goodbye to Preventable Failures

Modified on Tue, 5 Aug at 8:46 AM
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
 
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.