Why are my Klaviyo emails not being delivered?

First check status.klaviyo.com for email sending incidents. If the status page shows all-green, the issue is likely account-specific: check your Klaviyo sending domain authentication (DKIM, SPF, DMARC), verify your account isn't in a sending review or suppression state, check whether recipient addresses are on your suppression list, and confirm your Shopify/ecommerce integration is passing customer data correctly.

Is Klaviyo down or is my email campaign just delayed?

Klaviyo queues large campaign sends — a campaign to 100K subscribers doesn't send instantly even under normal conditions. If your campaign shows 'sending' but emails aren't arriving, check: (1) status.klaviyo.com for email sending delays. (2) Your Klaviyo account Activity Feed for errors. (3) Whether recipient email addresses are valid and unsuppressed. (4) Check spam folders, as campaign emails sometimes land there depending on engagement history.

How do I get alerts when Klaviyo goes down?

Subscribe to status.klaviyo.com email notifications, monitor your Klaviyo campaign delivery metrics in real time via the Klaviyo dashboard, and set up an independent monitor on the Klaviyo API endpoint if you use API-triggered sending. Third-party monitoring of your email delivery rates can catch sending degradation faster than Klaviyo's status page.

Does a Klaviyo outage mean my scheduled campaigns won't send?

During a Klaviyo email sending outage, scheduled campaigns may be delayed or queued rather than fully lost. Once service is restored, queued sends typically resume. However, time-sensitive campaigns (flash sales, event reminders) may miss their window. For critical sends during a confirmed outage, contact Klaviyo support to understand how your scheduled campaigns will be handled.

Klaviyo / Email & SMS Marketing

Klaviyo Status: How to Check If Klaviyo Is Down Right Now (2026)

Updated June 2026 · 6 min read · API Status Check

Quick Answer

Check Klaviyo status at status.klaviyo.com (official) for real-time email sending, SMS, and API status. If emails aren't delivering and the status page shows green, check your sending domain authentication and account suppression settings.

Staff Pick

📡 Monitor your APIs — know when they go down before your users do

Better Stack checks uptime every 30 seconds with instant Slack, email & SMS alerts. Free tier available.

Start Free →

Affiliate link — we may earn a commission at no extra cost to you

The Official Klaviyo Status Page

Klaviyo maintains an official status page at status.klaviyo.com. It tracks status across all Klaviyo services critical to email and SMS marketing:

Email Sending: Core email delivery infrastructure — campaign sends, flow/automation emails, and transactional messages. The most business-critical component for Klaviyo users

SMS Sending: Klaviyo SMS marketing delivery — campaign SMS, automated SMS flows, and two-way SMS conversations

Klaviyo Application: The app.klaviyo.com web interface — campaign builder, flow editor, list management, and analytics dashboards

Klaviyo API: REST API used for server-side event tracking, profile syncing, campaign triggering, and third-party integrations

Webhooks: Outbound webhooks from Klaviyo to third-party systems for events like email opens, clicks, bounces, and unsubscribes

Integrations (Shopify, WooCommerce, etc.): Data sync between Klaviyo and ecommerce platforms — customer profiles, order events, product catalog sync, and abandoned cart tracking

What Each Klaviyo Status Means

All Systems Operational: Klaviyo is fully functional. Campaigns send normally, flows trigger, the API accepts requests, and analytics update in real time. If you're seeing delivery issues, they're account-specific — check sending domain auth, suppression lists, and list health.

Degraded Performance: Klaviyo is working but slower than normal — delayed email delivery, slow campaign queuing, lagging analytics, or sluggish app performance. Emails will still be delivered but may arrive later than expected.

Partial Outage: Specific Klaviyo services are affected. For example, the API may be returning errors while campaign sends continue, or SMS may be delayed while email works normally. Check which specific component is affected on status.klaviyo.com.

Major Outage: Klaviyo email sending is broadly disrupted. Scheduled campaigns may fail to send or be queued. This impacts revenue directly for ecommerce businesses with active campaigns. Klaviyo publishes post-incident reports for major outages.

Under Maintenance: Scheduled maintenance window. Klaviyo announces planned maintenance in advance. During maintenance, sending may be paused or delayed — avoid scheduling large campaign sends during announced maintenance windows.

📡

Recommended

Monitor your Klaviyo email sending independently

Better Stack monitors Klaviyo availability and can alert you when your email sending platform is degraded — before your campaign metrics take a hit. Free tier included.

Try Better Stack Free →

Klaviyo Emails Not Delivering? Check These First

Most “Klaviyo not working” reports aren't global outages — they're account-level issues. Here are the most common causes:

Sending Domain Authentication Failure

Klaviyo requires DKIM and SPF records on your sending domain. If these DNS records are misconfigured or expire (some DNS providers have TTL issues), Klaviyo will suppress sending or emails will land in spam. Check your domain authentication status in Klaviyo Settings > Domains. Look for DKIM and SPF green checkmarks.

Account Sending Review or Suspension

Klaviyo monitors sending behavior and may pause your account if it detects unusually high bounce rates, spam complaints, or sudden volume spikes. If your account is in a sending review, you'll see a notification in the Klaviyo dashboard. This is not a Klaviyo outage — it's an account-level restriction requiring you to contact Klaviyo support.

Suppression List Growth

If a large portion of your list is suppressed (unsubscribes, hard bounces, manual suppressions), sends appear to go out but reach very few people. Check your Klaviyo suppression list size in Settings > Suppression List. High suppression rates from past bounces silently cap your deliverable audience.

Shopify / WooCommerce Integration Sync Lag

Klaviyo's ecommerce integrations sync customer and order data periodically. If the integration is broken or rate-limited, flows that trigger on order events (welcome series, post-purchase) won't fire. Check your integration sync status in Klaviyo Integrations and look for recent sync errors.

5 Ways to Check Klaviyo Status Right Now

Official Klaviyo Status Page

Visit status.klaviyo.com for real-time component status. Subscribe to email notifications to get alerted when incidents are posted.

status.klaviyo.com →

Klaviyo Status API

Query Klaviyo status programmatically via the Statuspage.io API endpoint.

# Check Klaviyo status via Statuspage.io API
curl -s https://status.klaviyo.com/api/v2/status.json | \
  python3 -m json.tool

# indicator: "none"=operational, "minor"=degraded,
# "major"=partial outage, "critical"=major outage

Check Your Klaviyo Account Activity Feed

In your Klaviyo account, navigate to the Activity Feed for recent sending events, errors, and integration logs. This shows account-specific issues independent of the platform status page.

X/Twitter Search

Search 'Klaviyo down' or 'Klaviyo not sending' on X. Email marketing teams post immediately when campaigns break, especially during revenue-critical sale periods.

Search X for 'Klaviyo down' →

Klaviyo Support

Contact Klaviyo support for account-specific issues. Klaviyo's support team can check your account sending logs and confirm whether an unreported issue is affecting your account specifically.

Klaviyo Support →

Common Klaviyo Errors and What They Mean

These are the errors and symptoms you'll see when Klaviyo is having issues:

"Campaign sent but no emails delivered / 0 opens"Check status.klaviyo.com for a sending incident. If all-green, verify that recipient addresses aren't suppressed and that your sending domain auth (DKIM/SPF) is correctly configured.

"Klaviyo API returning 429 Too Many Requests"You've hit Klaviyo's API rate limits. Klaviyo's REST API has per-endpoint rate limits. Implement exponential backoff in your integration and batch requests where possible.

"Flows not triggering / abandoned cart emails not sending"Check your Klaviyo integration sync status for your ecommerce platform. If the integration can't pass event data (add-to-cart, checkout started), flow triggers never fire. Also verify that your flow is live, not in draft.

"Klaviyo API returning 503 Service Unavailable"Klaviyo's API infrastructure is temporarily unavailable. Check status.klaviyo.com for a confirmed API incident. Implement retry logic with backoff in any server-side Klaviyo integrations.

"SMS messages not sending / stuck in queued"Check the SMS component on status.klaviyo.com. Also verify your Klaviyo SMS sending phone number is active, your account has SMS sending credits, and recipient numbers have not opted out.

"Klaviyo app extremely slow / timeouts loading segments"Degraded app performance — check status.klaviyo.com for a reported performance incident. Large list segmentation queries can be slow under any conditions; try running them during off-peak hours.

What to Do When Klaviyo Is Down

Immediate Response

Pause any large campaign sends until the outage is resolved
Reschedule time-sensitive campaigns (flash sales) for after recovery
Monitor status.klaviyo.com and subscribe to updates
Check Klaviyo's X account for real-time incident communication
Contact support if the outage affects a revenue-critical campaign window

Long-Term Resilience

Don't schedule major campaign sends (Black Friday, product launches) without a backup plan
Maintain a secondary transactional email provider (Postmark, SendGrid) for critical sends
Export active segment lists regularly as CSV backups
Set up API retry logic with exponential backoff in all Klaviyo integrations
Monitor email deliverability rates independently via your inbox provider stats

Frequently Asked Questions

Where is the official Klaviyo status page?

Klaviyo's official status page is at status.klaviyo.com. It tracks real-time status for email sending, SMS, the app, API, webhooks, and integrations. Subscribe to email notifications to get instant alerts when incidents are created or updated.

Will my Klaviyo campaigns that were scheduled during an outage still send?

During email sending incidents, scheduled campaigns are typically queued rather than dropped. Klaviyo usually sends queued campaigns once service is restored. However, for time-sensitive campaigns, the delivery window may be missed. Contact Klaviyo support if you have a time-critical campaign affected by a confirmed outage.

How do I check if Klaviyo is down or if it's a problem with my account?

Check status.klaviyo.com for global incidents. If the status page shows all-clear, the issue is likely account-specific: verify your sending domain authentication (DKIM/SPF), check your account for sending review notices, review your suppression list size, and check your ecommerce integration sync status. Most 'Klaviyo not working' issues are account configuration problems, not platform outages.

Does Klaviyo have an uptime SLA?

Klaviyo's SLA terms depend on your plan tier. Enterprise and higher-tier customers may have contractual uptime guarantees. Review your Klaviyo contract or contact Klaviyo's enterprise sales team for SLA details. Klaviyo publishes historical uptime at status.klaviyo.com.

What's the best alternative to Klaviyo during an outage?

For ecommerce email marketing, Klaviyo alternatives include Omnisend (strong ecommerce focus), Mailchimp, and ActiveCampaign. For developer-focused transactional email as a fallback during outages, consider Postmark or SendGrid. Maintaining a backup transactional email provider for critical sends is a common best practice for high-volume ecommerce brands.

Alert Pro

14-day free trial

Stop checking — get alerted instantly

Next time Klaviyo goes down, you'll know in under 60 seconds — not when your users start complaining.

Email alerts for Klaviyo + 9 more APIs
$0 due today for trial
Cancel anytime — $9/mo after trial

Start Free Trial →Compare all plans →

Also recommended:

Better Stack — all-in-one monitoring 1Password — secure your API keys