Is Heysender down?

Last checked 1m ago
Current status
Heysender is up

No incidents right now.

Heysender is operational right now. Last checked 1m ago; the most recent incident resolved 57d ago.

Real-time Heysender status, recent outages, and incident history: pulled directly from Heysender's official status page at status.heysender.com every 5 minutes. Pingoru tracks 4 Heysender services and has captured 6 incidents in the last 90 days (98.89% uptime). Get email, Slack, Discord, or webhook alerts the moment Heysender reports a new incident, free for 3 monitors, no credit card.

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Heysender uptime 98.89% uptime · past 90 days
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Recent outages & incidents

Past 90 days
  1. Resolved 1h 19m
    Started Sep 04, 2026, 12:00 PM UTC · Resolved Sep 04, 2026, 01:20 PM UTC
    Outgoing SMTP
    Timeline · 2 updates
    • monitoring · Sep 04, 2026, 12:00 PM UTC

      Since 9:50 CEST this morning Microsoft has had issues receiving email. This means that many emails sent to Office365 recipients will result in a soft bounce with this message: 52.101.68.10 failed after I sent the message./Remote host said: 451 4.7.500 Server busy. Please try again later from \[REDACTED\]. (S77714) \[[DB1PEPF000509E3.eurprd03.prod.outlook.com](http://DB1PEPF000509E3.eurprd03.prod.outlook.com) 2026-09-04T08:16:36.825Z 08DF04AEA47F75BA\]/ If you have access to the Office365 admin page they have created an issue to follow here: We're monitoring the issue but for now there is nothing we can do to force emails through. Emails sent during Microsoft downtime will be tried again for the following 48 hours until delivery is possible. (We're mainly creating this issue to have a place to point clients to for updates. There is nothing we can do inhouse to solve the issue.)

    • resolved · Sep 04, 2026, 01:20 PM UTC

      This incident has been resolved by Microsoft. We're working on emptying the queues and we expect all email to be delivered soon.

    Latest: This incident has been resolved by Microsoft. We're working on emptying the queues and we expect all email to be delivered soon.

  2. Resolved 1h 19m
    Started Sep 04, 2026, 12:00 PM UTC · Resolved Sep 04, 2026, 01:20 PM UTC
    Timeline · 2 updates
    • monitoring · Sep 04, 2026, 12:00 PM UTC

      Since 9:50 CEST this morning Microsoft has had issues receiving email. This means that many emails sent to Office365 recipients will result in a soft bounce with this message: 52.101.68.10 failed after I sent the message./Remote host said: 451 4.7.500 Server busy. Please try again later from \[REDACTED\]. (S77714) \[[DB1PEPF000509E3.eurprd03.prod.outlook.com](http://DB1PEPF000509E3.eurprd03.prod.outlook.com) 2026-09-04T08:16:36.825Z 08DF04AEA47F75BA\]/ If you have access to the Office365 admin page they have created an issue to follow here: We're monitoring the issue but for now there is nothing we can do to force emails through. Emails sent during Microsoft downtime will be tried again for the following 48 hours until delivery is possible. (We're mainly creating this issue to have a place to point clients to for updates. There is nothing we can do inhouse to solve the issue.).

    • resolved · Sep 04, 2026, 01:20 PM UTC

      This incident has been resolved by Microsoft. We're working on emptying the queues and we expect all email to be delivered soon..

    Latest: This incident has been resolved by Microsoft. We're working on emptying the queues and we expect all email to be delivered soon..

  3. Resolved 4h 42m
    Started Aug 10, 2026, 10:13 AM UTC · Resolved Aug 10, 2026, 02:55 PM UTC
    Timeline · 2 updates
    • investigating · Aug 10, 2026, 10:13 AM UTC

      We're currently experiencing issues sending e-mails from our system. We're investigating the cause..

    • resolved · Aug 10, 2026, 02:55 PM UTC

      Due to an issue with our hosting provider Heysender could not send email for a few hours this afternoon. The issue has been solved and we're monitoring the state of the service for the rest of the day..

    Latest: Due to an issue with our hosting provider Heysender could not send email for a few hours this afternoon. The issue has been solved and we're monitoring the state of the service for…

  4. Resolved 4h 42m
    Started Aug 10, 2026, 10:13 AM UTC · Resolved Aug 10, 2026, 02:55 PM UTC
    APIOutgoing SMTP
    Timeline · 2 updates
    • investigating · Aug 10, 2026, 10:13 AM UTC

      We're currently experiencing issues sending e-mails from our system. We're investigating the cause.

    • resolved · Aug 10, 2026, 02:55 PM UTC

      Due to an issue with our hosting provider Heysender could not send email for a few hours this afternoon. The issue has been solved and we're monitoring the state of the service for the rest of the day.

    Latest: Due to an issue with our hosting provider Heysender could not send email for a few hours this afternoon. The issue has been solved and we're monitoring the state of the service for…

Incident record

Since April 2026 · Instatus · 4 components checked every 5 minutes
21incidents recorded
10last 12 months
4last 90 days
12 daystypical duration, 12 months

The longest incident in the last year, Issues with events on April 16, 2026, ran for 116 days. 2 maintenance windows announced in the same period.

Most affected components, last 12 months

  • Overall3
  • Outgoing SMTP2
  • API1
  • App1

Latest incidents

  • Microsoft has issues receiving email September 4, 2026 · 79 minutes · degraded service

    Since 9:50 CEST this morning Microsoft has had issues receiving email. This means that many emails sent to Office365 recipients will result in a soft bounce…

  • Microsoft has issues receiving email September 4, 2026 · 79 minutes · degraded service

    Since 9:50 CEST this morning Microsoft has had issues receiving email. This means that many emails sent to Office365 recipients will result in a soft bounce…

  • Issues with sending. August 10, 2026 · 5 hours · degraded service

    We're currently experiencing issues sending e-mails from our system. We're investigating the cause..

Outage history

Past 90 days · 4 incidents View full outage history →