Fastmail Outage History

Fastmail is up right now

Fastmail had 16 outages in the last 2 years totaling 911h 55m of downtime, averaging 0.7 incidents per month.

There were 16 Fastmail outages since August 15, 2025 totaling 911h 55m of downtime. Each is summarised below. Incident details, duration, and resolution information.

Source: fastmailstatus.com

Minor October 14, 2026

Support web form not accessible

Detected by Pingoru
Oct 14, 2026, 06:01 AM UTC
Resolved
Oct 14, 2026, 06:10 AM UTC
Duration
9m
Timeline · 2 updates
  1. identified Oct 14, 2026, 06:01 AM UTC

    Customers are experiencing issues accessing our support web form ([https://support.fastmail.com/support/)](https://support.fastmail.com/support/) due to a change deployed at 1:52 PM AEDT. .

  2. resolved Oct 14, 2026, 06:10 AM UTC

    We have fixed the issue and users can access the support web form ( ) by reloading the page. Emails sent directly to our support address [[email protected]](mailto:[email protected]) were not affected. .

Read the full incident report →

Minor October 7, 2026

Interrupted access to Fastmail services

Detected by Pingoru
Oct 07, 2026, 04:40 AM UTC
Resolved
Oct 07, 2026, 10:03 AM UTC
Duration
5h 23m
Timeline · 3 updates
  1. investigating Oct 07, 2026, 04:40 AM UTC

    Some users are experiencing interrupted access to Fastmail services. We're looking into this..

  2. monitoring Oct 07, 2026, 09:36 AM UTC

    We believe that we have resolved the issue that was preventing some users from accessing Fastmail services. The issue was isolated to a single server and was related to internal authentication not being honored for users with periods (.) in their usernames. We are continuing to monitor. No mail has been lost..

  3. resolved Oct 07, 2026, 10:03 AM UTC

    This incident has been resolved. No mail has been lost as a result of this incident..

Read the full incident report →

Minor October 5, 2026

Support emails not generating tickets

Detected by Pingoru
Oct 05, 2026, 02:45 AM UTC
Resolved
Oct 07, 2026, 10:28 AM UTC
Duration
2d 7h
Timeline · 2 updates
  1. investigating Oct 05, 2026, 02:45 AM UTC

    We're currently looking into an issue where emails sent to [[email protected]](mailto:[email protected]) and [[email protected]](mailto:[email protected]) are not being generated as support tickets. Users who need to contact support can use our support form: .

  2. resolved Oct 07, 2026, 10:28 AM UTC

    Emails sent to our support team are being received and processed normally again. Any emails sent during this time have now been received, and we’ll respond as soon as possible..

Read the full incident report →

Minor September 23, 2026

Replies sent using masked email addresses are bouncing

Detected by Pingoru
Sep 23, 2026, 08:00 PM UTC
Resolved
Sep 24, 2026, 07:12 AM UTC
Duration
11h 12m
Timeline · 3 updates
  1. investigating Sep 23, 2026, 08:00 PM UTC

    We're currently experiencing an issue where replies sent from masked email addresses are bouncing with an error instead of being delivered. Our team is investigating the issue. As a workaround, please add the email address you're looking to send emails from under Settings → My email addresses. You'll then be able to send emails from that address..

  2. identified Sep 24, 2026, 06:48 AM UTC

    Our developers have identified the issue and are working towards a fix..

  3. resolved Sep 24, 2026, 07:12 AM UTC

    Our developers have resolved the issue. An update we made wasn't fully applied, causing messages sent from masked email addresses to bounce. If you were affected, you can resend any messages that bounced..

Read the full incident report →

Minor May 27, 2026

Intermittent outbound delivery issues

Detected by Pingoru
May 27, 2026, 10:24 PM UTC
Resolved
May 28, 2026, 01:00 AM UTC
Duration
2h 36m
Timeline · 2 updates
  1. investigating May 27, 2026, 10:24 PM UTC

    We're investigating reports of outbound mail issues. Some users have been experiencing deferrals or bounce backs on outbound messages..

  2. resolved May 28, 2026, 01:00 AM UTC

    We identified a problem which caused intermittent outbound issues leading to some users experiencing deferrals or bounce backs. We have remediated the problem. No mail has been lost..

Read the full incident report →

Minor March 26, 2026

Interrupted access to Fastmail web and app services

Detected by Pingoru
Mar 26, 2026, 04:45 PM UTC
Resolved
Mar 26, 2026, 07:04 PM UTC
Duration
2h 19m
Timeline · 3 updates
  1. investigating Mar 26, 2026, 04:45 PM UTC

    Some customers are experiencing interrupted access to Fastmail services. We're looking into it..

  2. monitoring Mar 26, 2026, 06:13 PM UTC

    We have implemented a fix for the issue and are currently monitoring the result. No mail has been lost. .

  3. resolved Mar 26, 2026, 07:04 PM UTC

    This incident has been resolved, and we do not anticipate any further issues. No mail has been lost. .

Read the full incident report →

Minor January 27, 2026

Microsoft update misclassifying Fastmail emails to Outlook addresses

Detected by Pingoru
Jan 27, 2026, 04:30 AM UTC
Resolved
Mar 02, 2026, 05:23 AM UTC
Duration
34d
Timeline · 5 updates
  1. identified Jan 27, 2026, 04:30 AM UTC

    A recent Microsoft update is sometimes incorrectly flagging some emails from several providers, including Fastmail. This is causing intermittent delivery issues for some email sent to addresses hosted on [outlook.com](http://outlook.com). We are seeing a small percentage of outgoing mail affected, with no obvious reason as to why. Our team is actively working with Microsoft's email team to get this resolved as soon as possible..

  2. monitoring Feb 05, 2026, 12:00 PM UTC

    Microsoft has addressed this issue and we believe the is now resolved. We continue to monitor..

  3. identified Feb 13, 2026, 08:30 PM UTC

    We’ve noticed that a small percentage of emails sent to Outlook-hosted addresses are being affected again. We’re in touch with Microsoft and working with them to resolve it..

  4. monitoring Feb 18, 2026, 05:29 AM UTC

    The deliverability issues affecting emails sent to Outlook-hosted addresses have stabilized. We are continuing to monitor..

  5. resolved Mar 02, 2026, 05:23 AM UTC

    The deliverability issues to Outlook-hosted email addresses are now resolved..

Read the full incident report →

Minor January 20, 2026

Internet routing issues affecting Australian Fastmail users

Detected by Pingoru
Jan 20, 2026, 08:30 AM UTC
Resolved
Jan 20, 2026, 02:08 PM UTC
Duration
5h 38m
Timeline · 5 updates
  1. identified Jan 20, 2026, 08:30 AM UTC

    We have received reports that users in several Australian locations are unable to connect to Fastmail via NBN. We have been able to reproduce the issue and are investigating the problem. It appears to be an internet routing issue and Fastmail systems and user data are not affected. If you are affected by the issue, you may be able to access Fastmail via an alternative internet connection e.g. mobile phone data. We will continue to investigate the problem and work on full restoration of access.

  2. identified Jan 20, 2026, 10:28 AM UTC

    Our network engineers have determined that there is no issue with Fastmail services or with our contracted connectivity providers. The problem may be with a part of the internet backbone or with a specific NBN ISP. We are reaching out to third-party support contacts and continuing to monitor the situation..

  3. monitoring Jan 20, 2026, 10:44 AM UTC

    Our network engineers have put in place a workaround that should allow all users to connect to Fastmail services again. We are continuing to work on the underlying problem, but we expect no further user impact at this time..

  4. monitoring Jan 20, 2026, 11:55 AM UTC

    We are continuing to monitor the result..

  5. resolved Jan 20, 2026, 02:08 PM UTC

    This incident has been resolved..

Read the full incident report →

Minor January 16, 2026

Access to Fastmail services impacted

Detected by Pingoru
Jan 16, 2026, 09:30 PM UTC
Resolved
Jan 16, 2026, 10:22 PM UTC
Duration
52m
Timeline · 3 updates
  1. investigating Jan 16, 2026, 09:30 PM UTC

    Access to Fastmail services has impacted all customers. We're looking into it..

  2. monitoring Jan 16, 2026, 09:45 PM UTC

    Access to our services is no longer impacted. We are continuing to monitor..

  3. resolved Jan 16, 2026, 10:22 PM UTC

    This incident has been resolved..

Read the full incident report →

Minor January 9, 2026

Interrupted access to Fastmail Services

Detected by Pingoru
Jan 09, 2026, 09:41 PM UTC
Resolved
Jan 09, 2026, 09:47 PM UTC
Duration
5m
Timeline · 2 updates
  1. investigating Jan 09, 2026, 09:41 PM UTC

    Some customers are experiencing interrupted access to Fastmail services. We're looking into it..

  2. resolved Jan 09, 2026, 09:47 PM UTC

    This incident has been resolved. No mail has been lost as a result of this incident, although delivery of some mail was delayed..

Read the full incident report →

Minor December 3, 2025

Some customers are unable to send messages

Detected by Pingoru
Dec 03, 2025, 02:59 AM UTC
Resolved
Dec 03, 2025, 04:14 AM UTC
Duration
1h 15m
Timeline · 3 updates
  1. investigating Dec 03, 2025, 02:59 AM UTC

    There is an internal forwarding issue affecting email sending. We are currently investigating..

  2. monitoring Dec 03, 2025, 03:49 AM UTC

    Email sending has resumed for affected users. We are actively monitoring this service for any further issues..

  3. resolved Dec 03, 2025, 04:14 AM UTC

    This incident has been resolved. No mail has been lost, and we don't anticipate further issues..

Read the full incident report →

Major November 18, 2025

Interrupted access to Fastmail services due to Cloudflare outage

Detected by Pingoru
Nov 18, 2025, 12:30 PM UTC
Resolved
Nov 18, 2025, 03:53 PM UTC
Duration
3h 23m
Timeline · 2 updates
  1. identified Nov 18, 2025, 12:30 PM UTC

    An outage at Cloudflare, our external web hosting provider, is preventing some users from accessing www.fastmail.com. Users should still be able to access webmail by going to [app.fastmail.com](http://app.fastmail.com) directly. Cloudflare hosts a large fraction of web content, so users may also see images or external links failing to load in emails..

  2. resolved Nov 18, 2025, 03:53 PM UTC

    Cloudflare has reported that this incident has been resolved..

Read the full incident report →

Minor October 28, 2025

Some users are experiencing delayed mail delivery.

Detected by Pingoru
Oct 28, 2025, 01:03 PM UTC
Resolved
Oct 28, 2025, 01:43 PM UTC
Duration
40m
Timeline · 2 updates
  1. investigating Oct 28, 2025, 01:03 PM UTC

    Some users are experiencing delayed mail delivery. We’re looking into the issue..

  2. resolved Oct 28, 2025, 01:43 PM UTC

    This incident has been resolved. No mail has been lost as a result of this incident, although delivery of some mail was delayed..

Read the full incident report →

Minor September 17, 2025

Some users are experiencing delayed mail delivery

Detected by Pingoru
Sep 17, 2025, 01:47 PM UTC
Resolved
Sep 17, 2025, 04:19 PM UTC
Duration
2h 32m
Timeline · 4 updates
  1. investigating Sep 17, 2025, 01:47 PM UTC

    Some users are experiencing delayed mail delivery. We're looking into it..

  2. investigating Sep 17, 2025, 02:50 PM UTC

    Some users are still experiencing issues with delayed mail. We're continuing to look into this. .

  3. monitoring Sep 17, 2025, 03:41 PM UTC

    We have resolved the issue that was causing delayed mail delivery. No mail has been lost. We're continuing to monitor. .

  4. resolved Sep 17, 2025, 04:19 PM UTC

    The issue that was causing mail to be delayed has been resolved. No mail has been lost. .

Read the full incident report →

Minor August 25, 2025

Issues with mail access

Detected by Pingoru
Aug 25, 2025, 05:45 PM UTC
Resolved
Aug 25, 2025, 07:00 PM UTC
Duration
1h 15m
Timeline · 2 updates
  1. monitoring Aug 25, 2025, 05:45 PM UTC

    We experienced a brief issue that affected access and users may have experienced slowness in loading the web interface. Access to most services remained unaffected, and no email was lost. The issue was quickly identified and we are continuing to monitor..

  2. resolved Aug 25, 2025, 07:00 PM UTC

    This incident has been resolved..

Read the full incident report →

Minor August 20, 2025

Third-party DNS service provider reported issues, Fastmail not impacted

Detected by Pingoru
Aug 20, 2025, 11:25 AM UTC
Resolved
Aug 20, 2025, 01:18 PM UTC
Duration
1h 53m
Timeline · 3 updates
  1. monitoring Aug 20, 2025, 11:25 AM UTC

    Cloudflare, our third-party DNS service provider, is currently having widespread issues. We are not aware of Fastmail customers being impacted, but we'll continue to monitor.

  2. monitoring Aug 20, 2025, 01:13 PM UTC

    The Cloudflare issue is ongoing however we have not had any reports of impact to Fastmail customers. We are continuing to monitor..

  3. resolved Aug 20, 2025, 01:18 PM UTC

    Cloudflare is operative and did not experience any issue, the notification was sent in error during a dry run of their systems. Fastmail customers experienced no impact and we were fully operational..

Read the full incident report →