Paubox Outage History

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Paubox had 20 outages in the last 2 years totaling 314h 22m of downtime — averaging 0.8 incidents per month.

There were 20 Paubox outages since July 18, 2025 totaling 314h 22m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.paubox.com

Notice May 12, 2026

Some hosted/webmail customers report certificate errors blocking mobile log in

Detected by Pingoru
May 12, 2026, 07:52 PM UTC
Resolved
May 13, 2026, 11:02 PM UTC
Duration
1d 3h
Affected: Hosted Mail
Timeline · 2 updates
  1. monitoring May 12, 2026, 07:52 PM UTC

    Some customers using our hosted/webmail reported certificate issues blocking access on mobile devices. We have refreshed our certificates again - if you are still seeing an error, please clear your cookies and cache. If this does not resolve your issue, take a screenshot and email [email protected] so we can isolate your specific issue.

  2. resolved May 13, 2026, 11:02 PM UTC

    This incident has been resolved.

Read the full incident report →

Minor April 8, 2026

Some Google Workspace customers report inbound & outbound delays on internal emails

Detected by Pingoru
Apr 08, 2026, 03:32 PM UTC
Resolved
Apr 08, 2026, 11:34 PM UTC
Duration
8h 1m
Affected: Inbound Security
Timeline · 5 updates
  1. monitoring Apr 08, 2026, 03:32 PM UTC

    We have had a few calls from some Google Workspace customers report inbound & outbound delays on internal emails which Down Dectector corroborates - see https://downdetector.com/status/gmail/ - we will continue to monitor this.

  2. monitoring Apr 08, 2026, 05:56 PM UTC

    Google has updated this site with more details: https://support.cloud.google.com/portal/system-status?product=WORKSPACE&cssp=true We will continue to monitor.

  3. monitoring Apr 08, 2026, 08:52 PM UTC

    Google has published this https://www.google.com/appsstatus/dashboard/incidents/224ozRqzW4sFBDK8hLnT We continue to monitor.

  4. monitoring Apr 08, 2026, 09:54 PM UTC

    Google has been releasing backed up mail - we expect resolution by 3pm PDT (their resolution estimate).

  5. resolved Apr 08, 2026, 11:34 PM UTC

    Google has marked this issue resolved.

Read the full incident report →

Minor April 7, 2026

Outbound delays for Hosted mail & SMTP server solution customers

Detected by Pingoru
Apr 07, 2026, 10:49 PM UTC
Resolved
Apr 08, 2026, 12:20 AM UTC
Duration
1h 30m
Affected: Hosted Mail
Timeline · 4 updates
  1. investigating Apr 07, 2026, 10:49 PM UTC

    We are currently investigating outbound delays for Hosted mail & SMTP server solution customers. We have not observed issues for any other outbound customers at present.

  2. identified Apr 07, 2026, 11:06 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Apr 07, 2026, 11:54 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Apr 08, 2026, 12:20 AM UTC

    Queues have recovered and delays as resolved.

Read the full incident report →

Minor March 29, 2026

Inbound mail delays reported

Detected by Pingoru
Mar 29, 2026, 09:05 PM UTC
Resolved
Mar 29, 2026, 10:32 PM UTC
Duration
1h 27m
Affected: Inbound Security
Timeline · 5 updates
  1. investigating Mar 29, 2026, 09:05 PM UTC

    We are currently investigating inbound mail delays.

  2. identified Mar 29, 2026, 09:18 PM UTC

    We have identified a database issue and are implementing a fix.

  3. monitoring Mar 29, 2026, 09:35 PM UTC

    A fix is in place and we are monitoring results.

  4. monitoring Mar 29, 2026, 10:09 PM UTC

    We are continuing to monitor - the deferred mail queue has dropped ~60% from the highest spike and new mail is flowing. We anticipate full resolution within the hour.

  5. resolved Mar 29, 2026, 10:32 PM UTC

    Inbound queues are healthy again. We'll complete an internal post mortem tomorrow and have an RCA available upon request.

Read the full incident report →

Minor March 18, 2026

Hosted/webmail customers reporting incorrect statuses

Detected by Pingoru
Mar 18, 2026, 07:43 PM UTC
Resolved
Mar 18, 2026, 10:48 PM UTC
Duration
3h 5m
Affected: Hosted Mail
Timeline · 4 updates
  1. investigating Mar 18, 2026, 07:43 PM UTC

    Customers using our hosted/webmail platform and smtp server solution have reported all their mail in logs is marked as queued. We are investigating.

  2. identified Mar 18, 2026, 07:49 PM UTC

    We have identified the cause and are implementing a fix.

  3. monitoring Mar 18, 2026, 08:23 PM UTC

    A fix has been implemented and we are monitoring results.

  4. resolved Mar 18, 2026, 10:48 PM UTC

    We observed status updates universally, but we discovered 2 customers still experiencing too many "queued" emails. Because the larger issue is resolved, we'll close this incident - but we are working on a fix and will communicate directly with the affected parties.

Read the full incident report →

Minor March 18, 2026

Outbound email customers reporting delays

Detected by Pingoru
Mar 18, 2026, 03:08 PM UTC
Resolved
Mar 18, 2026, 04:29 PM UTC
Duration
1h 20m
Affected: Outbound Security
Timeline · 4 updates
  1. investigating Mar 18, 2026, 03:08 PM UTC

    Outbound email customers are reporting delays in excess of 10 minutes. We are investigating.

  2. identified Mar 18, 2026, 03:19 PM UTC

    The issue has been identified and a fix is in progress.

  3. monitoring Mar 18, 2026, 03:47 PM UTC

    A fix has been implemented and we are monitoring results - current email testing is coming in under 5 minutes.

  4. resolved Mar 18, 2026, 04:29 PM UTC

    This incident has been resolved. Queues have returned to normal and delayed mail is being delivered.

Read the full incident report →

Minor March 3, 2026

Users unable to authenticate MFA codes

Detected by Pingoru
Mar 03, 2026, 10:40 PM UTC
Resolved
Mar 04, 2026, 12:05 AM UTC
Duration
1h 24m
Affected: Paubox Dashboard
Timeline · 4 updates
  1. investigating Mar 03, 2026, 10:40 PM UTC

    We are investigating why users are unable to verify MFA codes and begin fresh sessions in our admin app. If you are already logged in, you can navigate as usual.

  2. identified Mar 03, 2026, 11:17 PM UTC

    The issue has been isolated and a fix is in progress.

  3. monitoring Mar 03, 2026, 11:40 PM UTC

    A fix has been implemented & we are monitoring results.

  4. resolved Mar 04, 2026, 12:05 AM UTC

    The issue has been resolved.

Read the full incident report →

Notice February 25, 2026

Intermittent delivery delay affecting customers emailing hotmail.com & outlook.com

Detected by Pingoru
Feb 25, 2026, 10:25 PM UTC
Resolved
Feb 26, 2026, 07:38 PM UTC
Duration
21h 13m
Affected: Outbound Security
Timeline · 2 updates
  1. monitoring Feb 25, 2026, 10:25 PM UTC

    We are observing intermittent delivery delays affecting a limited subset of outbound messages to certain external domains (including hotmail.com and outlook.com). Our systems remain fully operational. We are actively monitoring and adjusting sending patterns as needed.

  2. resolved Feb 26, 2026, 07:38 PM UTC

    We are no longer observing intermittent delays - all mail that was deferred yesterday has been delivered.

Read the full incident report →

Notice February 23, 2026

Inbound customers report delay in quarantine logging

Detected by Pingoru
Feb 23, 2026, 05:45 PM UTC
Resolved
Feb 24, 2026, 02:17 AM UTC
Duration
8h 31m
Affected: Inbound Security
Timeline · 3 updates
  1. identified Feb 23, 2026, 05:45 PM UTC

    Inbound email customers have reported a delay in their quarantine log propagation. Emails are marked quarantine in their mail log, but do not appear in quarantine until hours later. There is no mail flow or data loss issue, but we have identified a problem with timestamps and are working to correct it.

  2. monitoring Feb 23, 2026, 09:56 PM UTC

    We have shipped a correction and are monitoring the results.

  3. resolved Feb 24, 2026, 02:17 AM UTC

    This incident has been resolved.

Read the full incident report →

Notice January 22, 2026

Microsoft outage

Detected by Pingoru
Jan 22, 2026, 08:20 PM UTC
Resolved
Jan 23, 2026, 02:19 PM UTC
Duration
17h 58m
Timeline · 2 updates
  1. identified Jan 22, 2026, 08:20 PM UTC

    Microsoft365 outage reported on the Microsoft Service Health Status page

  2. resolved Jan 23, 2026, 02:19 PM UTC

    This incident has been resolved. Microsoft Service Health Status - https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect

Read the full incident report →

Minor December 3, 2025

Some customers report outbound mail delays

Detected by Pingoru
Dec 03, 2025, 05:07 PM UTC
Resolved
Dec 04, 2025, 04:08 AM UTC
Duration
11h
Affected: Outbound Security
Timeline · 7 updates
  1. investigating Dec 03, 2025, 05:07 PM UTC

    Some customers report outbound mail delays in excess of 10 min - we are investigating

  2. identified Dec 03, 2025, 05:17 PM UTC

    We have identified the issue and are working on a fix.

  3. identified Dec 03, 2025, 07:30 PM UTC

    We're continuing to work on the fix for this issue.

  4. monitoring Dec 03, 2025, 08:45 PM UTC

    A fix is in place a new mail is flowing normally - we expect another 3-4 hours for the deferred queue to unspool. We'll continue to monitor and update you if anything changes.

  5. investigating Dec 03, 2025, 10:13 PM UTC

    Customers are reporting missing outbound mail log data - we are investigating.

  6. monitoring Dec 03, 2025, 11:27 PM UTC

    Mail log data has been restored. We are continuing to monitor the deferred queue while it processes the backlog.

  7. resolved Dec 04, 2025, 04:08 AM UTC

    The deferral queue has cleared and outbound is functioning normally.

Read the full incident report →

Minor November 28, 2025

Some customers reporting deferrals from Yahoo & affiliates

Detected by Pingoru
Nov 28, 2025, 06:11 PM UTC
Resolved
Dec 06, 2025, 02:17 AM UTC
Duration
7d 8h
Affected: Outbound Security
Timeline · 3 updates
  1. monitoring Nov 28, 2025, 06:11 PM UTC

    Some customers are reporting outbound deferrals from Yahoo & affiliates - we are keeping an eye on this.

  2. monitoring Dec 04, 2025, 04:08 AM UTC

    We are continuing to monitor reports of Yahoo deferrals independent of today's incident.

  3. resolved Dec 06, 2025, 02:17 AM UTC

    Email to yahoo.com and affiliates (aol.com, verizon.net, att.net, sbcglobal.net, cox.net, etc) is delivering as normal.

Read the full incident report →

Minor September 29, 2025

Some Email API customers reporting HTTP response timeouts

Detected by Pingoru
Sep 29, 2025, 07:37 PM UTC
Resolved
Sep 29, 2025, 10:18 PM UTC
Duration
2h 40m
Affected: REST API
Timeline · 4 updates
  1. investigating Sep 29, 2025, 07:37 PM UTC

    We are investigating reports of HTTP response timeouts on Email API.

  2. identified Sep 29, 2025, 08:25 PM UTC

    We have identified the issue and are working on a fix.

  3. monitoring Sep 29, 2025, 09:24 PM UTC

    We have implemented a fix and are monitoring the results.

  4. resolved Sep 29, 2025, 10:18 PM UTC

    We have been unable to recreate timeout errors post update.

Read the full incident report →

Minor September 18, 2025

Intermittent inbound mail delays

Detected by Pingoru
Sep 18, 2025, 01:32 AM UTC
Resolved
Sep 18, 2025, 04:52 AM UTC
Duration
3h 20m
Affected: Inbound Security
Timeline · 4 updates
  1. investigating Sep 18, 2025, 01:32 AM UTC

    We're currently investigating delays for some inbound mail. Customers viewing their Paubox dashboard's Inbound Security Mail Log may see a mix of emails with "Delivered" status and "No Delivery Status Found".

  2. identified Sep 18, 2025, 04:02 AM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Sep 18, 2025, 04:30 AM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Sep 18, 2025, 04:52 AM UTC

    This incident is now resolved. Any mail that was delayed has been delivered or is delivering now. Where applicable, a new Inbound Security Mail Log entry with "Delivered" status was created. Please disregard older, duplicate "No Delivery Status Found" mail log entries for the same email due to this issue.

Read the full incident report →

Minor September 9, 2025

Some customers reporting inbound mail deferrals

Detected by Pingoru
Sep 09, 2025, 06:18 PM UTC
Resolved
Sep 10, 2025, 07:23 PM UTC
Duration
1d 1h
Affected: Inbound Security
Timeline · 4 updates
  1. identified Sep 09, 2025, 06:18 PM UTC

    Some inbound customers are reporting delays and deferrals on receiving mail. We have identified the cause and are working on a resolution.

  2. monitoring Sep 09, 2025, 10:21 PM UTC

    A fix has been shipped and we are monitoring results.

  3. monitoring Sep 10, 2025, 03:06 PM UTC

    while we released a fix last night, some customers continue to report missing mail log statuses from Monday 9/8 to Tuesday 9/9 - we are still reviewing these reports

  4. resolved Sep 10, 2025, 07:23 PM UTC

    After thorough investigation we found: - A new log entry was added each time a piece of mail was deferred - “No Delivery Status Found” mail log rows didn’t get updated when the email was later delivered - Instead, a brand new mail log entry with the “Delivered” status was written

Read the full incident report →

Notice September 8, 2025

Inbound mail delays

Detected by Pingoru
Sep 08, 2025, 01:18 PM UTC
Resolved
Sep 08, 2025, 04:17 PM UTC
Duration
2h 58m
Affected: Inbound Security
Timeline · 4 updates
  1. investigating Sep 08, 2025, 01:18 PM UTC

    We are currently investigating this issue.

  2. identified Sep 08, 2025, 02:03 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Sep 08, 2025, 03:07 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Sep 08, 2025, 04:17 PM UTC

    This incident has been resolved. Missing delivery statuses should be updated before the end of the day

Read the full incident report →

Major August 21, 2025

Delivery Delays

Detected by Pingoru
Aug 21, 2025, 11:36 PM UTC
Resolved
Aug 22, 2025, 12:42 AM UTC
Duration
1h 5m
Affected: Outbound Security
Timeline · 4 updates
  1. investigating Aug 21, 2025, 11:36 PM UTC

    We are currently experiencing delays with outbound delivery. Our engineering team is investigating the issue.

  2. identified Aug 21, 2025, 11:54 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Aug 21, 2025, 11:54 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Aug 22, 2025, 12:42 AM UTC

    This incident has been resolved.

Read the full incident report →

Minor August 6, 2025

Intermittent inbound & outbound email delays

Detected by Pingoru
Aug 06, 2025, 08:23 PM UTC
Resolved
Aug 02, 2025, 03:00 PM UTC
Duration
—
Timeline · 1 update
  1. resolved Aug 06, 2025, 08:23 PM UTC

    Some customers reported mail delays on Saturday August 2nd. We restarted the service causing the delay and the mail queues cleared immediately. Some customers reported lingering mail status inaccuracies, but these were cleared up by Monday August 4th.

Read the full incident report →

Notice August 1, 2025

Intermittent mail delays

Detected by Pingoru
Aug 01, 2025, 12:47 PM UTC
Resolved
Aug 01, 2025, 01:10 PM UTC
Duration
22m
Affected: Outbound SecurityInbound Security
Timeline · 3 updates
  1. investigating Aug 01, 2025, 12:47 PM UTC

    We are currently investigating this issue.

  2. monitoring Aug 01, 2025, 12:58 PM UTC

    This issue has been resolved and we are monitoring

  3. resolved Aug 01, 2025, 01:10 PM UTC

    This incident has been resolved.

Read the full incident report →

Major July 18, 2025

Outbound email delays for Paubox Email API, Paubox SMTP API, Paubox Marketing.

Detected by Pingoru
Jul 18, 2025, 02:44 AM UTC
Resolved
Jul 17, 2025, 11:30 AM UTC
Duration
—
Timeline · 1 update
  1. resolved Jul 18, 2025, 02:44 AM UTC

    Email delays as a result of a specific service failure on mail server. Normal email delivery resumed on restart; remediation includes upgrading this service, upgrading our load balancing service, adding critical health alerts, and running regular internal incident drills.

Read the full incident report →