SparkPost Status: check for SparkPost outages and issues

SparkPost status is Operational

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SMTP Delivery - USA

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Transmissions API - USA

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SparkPost Mailbox Provider Service Interruption

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See all 41 SparkPost components

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Active Incidents

No active incidents

Recently Resolved Incidents

Microsoft Mail Delivery Delays and Temporary Rejections

Started 26 Feb 2026 17:55:21 (4 days ago), resolved 27 Feb 2026 17:38:03 (3 days ago)

Minor Incident

Resolved

Mailbox Provider Service Interruption

We are currently seeing elevated temporary rejection rates for email delivered to Outlook.com, Hotmail, and other Microsoft-hosted addresses. Microsoft has acknowledged the issue and is actively investigating. This is a industry-wide issue and not isolated to any specific account. We will continue to monitor and update this page as we receive more information.

Next update: When Microsoft posts a resolution or Bird observes delivery rates normalizing

See all updates

Elevated 5xx Transmissions API error rates and latency for some SparkPost customers (US hosted only)

Started 24 Feb 2026 19:07:28 (6 days ago), resolved 24 Feb 2026 19:41:52 (6 days ago)

Major Incident

Resolved

Transmissions API - USA

We are experiencing an elevated level of errors and latency on the Transmissions API (injection API) for some SparkPost customers. Please retry any 5xx error.

Note: This issue does not impact SparkPost customers hosted in the EU.

See all updates

Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)

Started 24 Feb 2026 15:01:58 (6 days ago), resolved 24 Feb 2026 18:17:11 (6 days ago)

Minor Incident

Resolved

SMTP Delivery - USA

We are currently investigating this issue. No messages are lost.

See all updates

SparkPost Outage Survival Guide

A step-by-step guide to help you survive a SparkPost outage

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SparkPost Components

SparkPost

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SparkPost Application (WebUI)

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SparkPost Application - USA

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SparkPost Application - EUROPE

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Sun 1

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SparkPost SMTP Delivery (Outbound Message Delivery)

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Sun 1

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SMTP Delivery - USA

Mon 23

Tue 24

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Sun 1

now

Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)

Started 24 Feb 2026 15:01:58 (6 days ago), resolved 24 Feb 2026 18:17:11 (6 days ago)

Minor Incident

Resolved

SMTP Delivery - USA

We are currently investigating this issue. No messages are lost.

See all updates

SMTP Delivery - EUROPE

Mon 23

Tue 24

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Sun 1

now

SparkPost Transmissions API

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Sun 1

now

Transmissions API - USA

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Tue 24

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Sun 1

now

Elevated 5xx Transmissions API error rates and latency for some SparkPost customers (US hosted only)

Started 24 Feb 2026 19:07:28 (6 days ago), resolved 24 Feb 2026 19:41:52 (6 days ago)

Major Incident

Resolved

Transmissions API - USA

We are experiencing an elevated level of errors and latency on the Transmissions API (injection API) for some SparkPost customers. Please retry any 5xx error.

Note: This issue does not impact SparkPost customers hosted in the EU.

See all updates

Transmissions API - EUROPE

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Tue 24

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Sun 1

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SparkPost SMTP API

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Sun 1

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SMTP API - USA

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Sun 1

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SMTP API - EUROPE

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Sun 1

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SparkPost Metrics API

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Sun 1

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Metrics API - USA

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Sun 1

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Metrics API - EUROPE

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Sun 1

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SparkPost Events API

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Sun 1

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Events API - USA

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Sun 1

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Events API - EUROPE

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Sun 1

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SparkPost Relay Webhooks Delivery Service

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Sun 1

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Relay Webhooks - USA

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Sun 1

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Relay Webhooks - EUROPE

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Sun 1

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SparkPost Sending Domains API

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Sun 1

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Sending Domains API - USA

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Sun 1

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Sending Domains API - EUROPE

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SparkPost Suppression List API

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Sun 1

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Suppression List API - USA

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Suppression List API - EUROPE

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SparkPost Event Webhook Delivery Service

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Event Webhooks - USA

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Event Webhooks - EUROPE

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SparkPost Engagement Tracking Service

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Sun 1

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Engagement Tracking Service (redirecting clicks and serving opens) - USA

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Sun 1

now

Engagement Tracking Service (redirecting clicks and serving opens) - EUROPE

Mon 23

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Sun 1

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SparkPost Mailbox Provider Service Interruption

Mon 23

Tue 24

Wed 25

Thu 26

Fri 27

Sat 28

Sun 1

now

Microsoft Mail Delivery Delays and Temporary Rejections

Started 26 Feb 2026 17:55:21 (4 days ago), resolved 27 Feb 2026 17:38:03 (3 days ago)

Minor Incident

Resolved

Mailbox Provider Service Interruption

Next update: When Microsoft posts a resolution or Bird observes delivery rates normalizing

See all updates

SparkPost Blocklist API

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Sun 1

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Blocklist API - USA

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Blocklist API - EUROPE

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SparkPost Alerts API

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Alerts API - USA

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Alerts API - EUROPE

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SparkPost Status

Real-time updates of SparkPost issues and outages

SparkPost status is Operational

SMTP Delivery - USA

Transmissions API - USA

SparkPost Mailbox Provider Service Interruption

Active Incidents

Recently Resolved Incidents

SparkPost Outage Survival Guide

SparkPost Components

SparkPost Application (WebUI)

SparkPost Application - USA

SparkPost Application - EUROPE

SparkPost SMTP Delivery (Outbound Message Delivery)

SMTP Delivery - USA

SMTP Delivery - EUROPE

SparkPost Transmissions API

Transmissions API - USA

Transmissions API - EUROPE

SparkPost SMTP API

SMTP API - USA

SMTP API - EUROPE

SparkPost Metrics API

Metrics API - USA

Metrics API - EUROPE

SparkPost Events API

Events API - USA

Events API - EUROPE

SparkPost Relay Webhooks Delivery Service

Relay Webhooks - USA

Relay Webhooks - EUROPE

SparkPost Sending Domains API

Sending Domains API - USA

Sending Domains API - EUROPE

SparkPost Suppression List API

Suppression List API - USA

Suppression List API - EUROPE

SparkPost Event Webhook Delivery Service

Event Webhooks - USA

Event Webhooks - EUROPE

SparkPost Engagement Tracking Service

Engagement Tracking Service (redirecting clicks and serving opens) - USA

Engagement Tracking Service (redirecting clicks and serving opens) - EUROPE

SparkPost Mailbox Provider Service Interruption

SparkPost Blocklist API

Blocklist API - USA

Blocklist API - EUROPE

SparkPost Alerts API

Alerts API - USA

Alerts API - EUROPE

SparkPost Alternatives

Commonly Used Together