If some of your WhatsApp messages are not being delivered, DMLY allows you to quickly identify affected contacts and understand the reason for the failure.
Follow the steps below to locate undeliverable or failed WhatsApp contacts.
Step-by-Step Guide
Go to the Contacts SectionFrom your DMLY dashboard:
Click Contacts in the left sidebar.
Filter for Failed or Undeliverable ContactsUse the filter option:
Toggle the “Message Undeliverable / Failed Contacts” filter.
This will display only contacts where WhatsApp message delivery failed.
Failed contacts are marked with a 
warning or exclamation icon.
Check the Error ReasonHover your cursor over the warning icon next to the contact.
You’ll see the exact reason for the failure, such as:
Invalid phone number
User blocked your business
Outdated WhatsApp version
WhatsApp account not active
Template rejection or policy restriction
This helps you take the correct action immediately.
Common Reasons for Failed WhatsApp Messages
Invalid NumberThe phone number is incorrect or not registered on WhatsApp.
User Blocked Your BusinessThe recipient has blocked your WhatsApp number.
WhatsApp Not Installed / InactiveThe contact may not have an active WhatsApp account.
Template or Policy IssueYour message template may not be approved or may violate policy.
How to Fix Undeliverable MessagesHere are some actions you can take:
Correct invalid phone numbers in your contact list.
Resend the message after the issue is resolved.
Ask the user to unblock your business number.
Reach out via another channel to reconnect.
Best PracticeRegularly review failed contacts to:
Clean up invalid numbers
Maintain healthy delivery rates
Improve broadcast performance
Protect your WhatsApp sender reputation
Pro TipIf you’re running broadcasts, always:
Check failed contacts after the campaign.
Export logs if needed.
Remove permanently invalid numbers from your list.
