All Systems Operational

Uptime over the past 90 days. View historical uptime.
API Operational
90 days ago
100.0 % uptime
Today
Curations API Operational
90 days ago
100.0 % uptime
Today
Marketing API Operational
90 days ago
100.0 % uptime
Today
Applications Operational
90 days ago
100.0 % uptime
Today
Archives Operational
90 days ago
100.0 % uptime
Today
Audience Operational
90 days ago
100.0 % uptime
Today
Composer Operational
90 days ago
100.0 % uptime
Today
Dashboards Operational
90 days ago
100.0 % uptime
Today
Newsletters Operational
90 days ago
100.0 % uptime
Today
Promotions Operational
90 days ago
100.0 % uptime
Today
Delivery Operational
90 days ago
99.99 % uptime
Today
Outbound Email Deliverability (Shared Pools) Operational
90 days ago
99.99 % uptime
Today
Outbound Email Deliverability (Dedicated Pools) Operational
90 days ago
100.0 % uptime
Today
Services Operational
90 days ago
99.99 % uptime
Today
Authorization Operational
90 days ago
100.0 % uptime
Today
Automation Operational
90 days ago
100.0 % uptime
Today
Curation Operational
90 days ago
100.0 % uptime
Today
Documentation Operational
90 days ago
100.0 % uptime
Today
Email Service Provider Operational
90 days ago
99.99 % uptime
Today
Metrics Operational
90 days ago
100.0 % uptime
Today
Notifications Operational
90 days ago
100.0 % uptime
Today
Transactional Emails Operational
90 days ago
100.0 % uptime
Today
Webhooks Operational
90 days ago
100.0 % uptime
Today
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Mar 6, 2026

No incidents reported today.

Mar 5, 2026
Isolated Preview-Generation Error Related to Background Color Block Setting
Resolved - This incident has been resolved.
Mar 5, 17:39 EST
Monitoring - All looks well. We'll watch for a bit.
Mar 5, 17:38 EST
Identified - We are seeing a small but consistent-enough amount of errors where previews are failing for global templates. We've narrowed the issue down to odd background color settings, and we are looking into it. This affects < 1% of newsletters.
Mar 5, 16:41 EST
Monitoring Isolated Newsletter Publication Status Error
Resolved - All's well.
Mar 5, 09:18 EST
Monitoring - We have observed a couple of odd errors in which the newsletter status failed to change to "puiblished" after being sent. There's no indication of this being a widespread issue, but we're proactively monitoring.
Mar 5, 08:28 EST
Mar 4, 2026
Isolated Tenant Upstream Connectivity Issue
Resolved - This incident has been resolved.
Mar 4, 14:27 EST
Monitoring - Everything's looking copacetic. We will monitor for awhile longer. Sorry for the fright.
Mar 4, 14:14 EST
Update - Confirming that this is affecting the affected tenant's user interface, but neither delivery nor archives
Mar 4, 13:50 EST
Investigating - We are investigating an issue causing requests for a single tenant to return upstream availability errors (“no healthy upstream”). All other tenants remain unaffected. Engineers are actively working on resolution.
Mar 4, 13:47 EST
Mar 3, 2026
Elevated Curation Error Rates
Resolved - This incident has been resolved.
Mar 3, 14:45 EST
Monitoring - Okie dokie. It looks like all things are back to normal. We'll keep monitoring.
Mar 3, 14:20 EST
Update - Just confirming that this may cause issues when previewing newsletter templates using curation blocks. A patch is deploying.
Mar 3, 14:04 EST
Identified - We've noticed a spike of errors related around curation fetching. We believe we've already identified the underlying issue.
Mar 3, 13:51 EST
Mar 2, 2026
Double-optin Email Confirmation Delivery - Elevated Misconfiguration Rates
Resolved - This incident has been resolved.
Mar 2, 14:37 EST
Monitoring - We addressed the underlying issue and we're keeping our eye on it.
Mar 2, 12:45 EST
Update - We are continuing to work on a fix for this issue.
Mar 2, 12:06 EST
Identified - We're seeing an elevated rate of errors related to domain misconfiguration as it relates to double-optin email confirmations.
Mar 2, 12:04 EST
Mar 1, 2026

No incidents reported.

Feb 28, 2026

No incidents reported.

Feb 27, 2026
Audience Dashboard Visibility
Resolved - This incident has been resolved.
Feb 27, 14:56 EST
Identified - The issue has been identified and a fix is being implemented.
Feb 27, 13:27 EST
Investigating - We’re currently investigating reports of unexpected behavior across parts of the Letterhead application. Some users may experience issues with data visibility or functionality in certain areas of the app.
Feb 27, 12:26 EST
Microsoft-hosted Email Addresses Bouncing
Resolved - Microsoft has confirmed that they made additional changes the night of Thursday, Feb 26th that should have remediated most IP rate limiting and rejection issues.  If you are still seeing impacts, please reach out via your normal support channels and our team can investigate and escalate with Microsoft.
Feb 27, 13:25 EST
Update - We are continuing to monitor for any further issues.
Feb 26, 14:26 EST
Monitoring - Microsoft is reporting elevated temporary rejection rates for emails delivered to Outlook.com, Hotmail, and other Microsoft-hosted addresses. They are actively investigating. This is an industry-wide issue and not isolated to a specific service or sender. We will continue to monitor and update this page as we receive more information.
Feb 26, 14:25 EST
Feb 26, 2026
Feb 25, 2026

No incidents reported.

Feb 24, 2026
Elevated Delivery Error Rates
Resolved - This incident has been resolved.
Feb 24, 15:56 EST
Update - Letterhead is self-healing from the upstream outage and newsletters are going out as expected. Note, we retry delivery in a staggered pattern after such an event, so it make take up to an hour for a newsletter to fully send through its audience, depending on the audience size.
Feb 24, 15:05 EST
Update - It appears the issue has been resolved. We are checking everything on our end to ensure any resulting issues are healing, newsletters delivering, and metrics collecting.
Feb 24, 14:47 EST
Monitoring - A fix in our upstream provider has been implemented, and they - like we - are monitoring results.
Feb 24, 14:44 EST
Identified - One of our upstream providers is experiencing a partial outage, which is affecting Letterhead's newsletter delivery. Newsletter delivery may be delayed, and your newsletters' statuses may remain in "sending" for longer than usual. See: https://status.sparkpost.com/incidents/ndjn00g5vwm3
Feb 24, 14:13 EST
Feb 23, 2026

No incidents reported.

Feb 22, 2026

No incidents reported.

Feb 21, 2026

No incidents reported.

Feb 20, 2026

No incidents reported.

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