Klaviyo Emails Not Delivering: Diagnose Delivery Issues
Your Klaviyo emails are not being delivered
Fix within hours — every hour costs revenue.
Check Klaviyo delivery status:
Verify domain is authenticated in Klaviyo
Check if campaigns are actually sending
Review bounce/hard error rates
What Could Be Causing This?
Domain Not Authenticated
Most CommonUnverified domain blocks sending.
How to confirm:
Check Klaviyo domain settings.
IP Reputation Too Low
CommonPoor reputation results in rejections.
How to confirm:
Check Klaviyo IP status.
Bounce Rate Spike
CommonVery high bounce rate blocks sending.
How to confirm:
Check Klaviyo bounce metrics.
Fix Playbook
Step 1: Verify Domain & Check List Quality
- Verify domain in Klaviyo
- Check DMARC/SPF/DKIM setup
- Remove bounced addresses
- Test send to known good address
Klaviyo-Specific Note:
Klaviyo support can temporarily whitelist if domain is authentic.
Prevention Checklist
- Keep domain authenticated
- Monitor bounce rate daily
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