Feb <var data-var='date'>26</var>, <var data-var='time'>12:18</var> GMT Resolved - This incident has been resolved. Feb <var data-var='date'>26</var>, <var data-var='time'>09:08</var> GMT Identified - We’re aware of an issue affecting a small subset of customers that is preventing SMS messages from being delivered to their accounts. Our team is actively investigating, and we expect to restore normal service as soon as possible.

SMS deliverability issues for some customers

Aug <var data-var='date'>11</var>, <var data-var='time'>11:52</var> BST Resolved - This incident has been resolved. Aug <var data-var='date'>11</var>, <var data-var='time'>11:10</var> BST Monitoring - We're aware of an issue affecting some customers who are attempting to send emails to external addresses. As a result of a false-positive inclusion of one of our IP addresses in a blocklist, connections to some mail services are being rejected. The IP in question has since been removed from the list, but it may take several hours for this to propagate to other mail services. We are continuing to monitor this issue and will update when we're comfortable that this has been fully resolved.

Some customers unable to forward emails

Aug <var data-var='date'> 6</var>, <var data-var='time'>00:00</var> BST Resolved - Some customers were affected for several hours in certain regions due to a sustained performance degradation of our services. Services experienced significant activity increase, with a delayed scale up resulting in an inability to handle all API calls. This issue has now been resolved, we apologies to all those impacted by this.

Service outage

Jun <var data-var='date'>12</var>, <var data-var='time'>21:20</var> BST Resolved - This incident has now been resolved. Jun <var data-var='date'>12</var>, <var data-var='time'>20:33</var> BST Monitoring - Google have now resolved the issue affecting our services - we are continue to monitor the situation. Jun <var data-var='date'>12</var>, <var data-var='time'>20:14</var> BST Update - A further update has been provided by Google - "Our engineers are continuing to mitigate the issue and we have confirmation that the issue is recovered in some locations. We do not have an ETA on full mitigation at this point." Incident page: https://status.cloud.google.com/incidents/ow5i3PPK96RduMcb1SsW Jun <var data-var='date'>12</var>, <var data-var='time'>20:05</var> BST Update - The following update has been provided by Google - "Our engineering team continues to investigate the issue. We will provide an update by Thursday, 2025-06-12 12:15 PDT with current details." Incident page: https://status.cloud.google.com/incidents/ow5i3PPK96RduMcb1SsW Jun <var data-var='date'>12</var>, <var data-var='time'>19:55</var> BST Identified - We are experiencing issues with authentication and core services related to an upstream issue with Google Cloud services (https://status.cloud.google.com/) We will provide updates as soon as we have them, but hope to have normal service resumed shortly.

Investigating issues with authentication and API services

Mar <var data-var='date'>12</var>, <var data-var='time'>16:15</var> GMT Resolved - This issue was resolved. Mar <var data-var='date'>12</var>, <var data-var='time'>15:50</var> GMT Identified - We are aware of an issue, related to our support chat functionality, which is causing the Mailosaur UI to be slow to load. Our team is working on a fix for this right now and we hope to have a resolution very quickly.

Mailosaur UI is experiencing degraded performance

Feb <var data-var='date'> 6</var>, <var data-var='time'>18:29</var> GMT Resolved - This incident is now closed following a solution implemented by Google. Feb <var data-var='date'> 6</var>, <var data-var='time'>18:01</var> GMT Monitoring - Services are returning to normal for all customers. We will continue to monitor for the next few hours. Feb <var data-var='date'> 6</var>, <var data-var='time'>17:38</var> GMT Update - Mitigation work is currently underway by our Google's engineering team. We do not have an ETA for mitigation at this point. We will provide an update within the next hour. Feb <var data-var='date'> 6</var>, <var data-var='time'>17:26</var> GMT Identified - Google Cloud Networking have confirmed that there is a known issue with increased network latency which is causing issues with SMTP/POP3 connections from outside Europe. Google have confirmed their networking team is actively investigating this issue and attempting to fix ASAP. Feb <var data-var='date'> 6</var>, <var data-var='time'>16:40</var> GMT Update - The issues impacting SMTP and POP3 for some customers only relate to connections outside of Europe. Our team believes this issues is related to Google Cloud Platform network load balancing, but we are still investigating at this time. The nature of SMTP means that emails will automatically be retried and arrive in most cases, but you may see delays in arrival. Feb <var data-var='date'> 6</var>, <var data-var='time'>15:01</var> GMT Investigating - We are aware of an issue impacting come clients connecting via SMTP and POP3. This is being actively investigated, we will update as soon as possible.

Intermittent connectivity issues for SMTP and POP3

Jan <var data-var='date'>11</var>, <var data-var='time'>20:52</var> GMT Resolved - We are satisfied that normal SMS service has now resumed for some time and so are now closing this incident Jan <var data-var='date'>11</var>, <var data-var='time'>19:27</var> GMT Monitoring - A fix has been implemented and we are starting to see SMS services resume to normal. We are continuing to monitor this process. Jan <var data-var='date'>11</var>, <var data-var='time'>19:07</var> GMT Update - Our supplier has identified the cause of the issue affecting some SMS numbers and is working to resolve this as soon as possible. We will update when further information is available. Jan <var data-var='date'>11</var>, <var data-var='time'>16:52</var> GMT Update - We are continuing to work with our supplier on this matter, we are looking to resolve this issue as soon as possible. Jan <var data-var='date'>11</var>, <var data-var='time'>15:19</var> GMT Identified - We are aware that some customers are not receiving SMS messages to their Mailosaur phone numbers. This is being caused by an issue with one of our service suppliers, which we are actively investigating now. We will provide an update as soon as possible.

SMS messages not being delivered to some numbers

Oct <var data-var='date'>19</var>, <var data-var='time'>15:30</var> BST Resolved - An update was applied today which causes several customers to be logged out and unable to log back into the Mailosaur Dashboard, this has now been resolved by our team and you should no longer see any issues.

Some users unable to log into the Dashboard

May <var data-var='date'>11</var>, <var data-var='time'>18:16</var> BST Resolved - The earlier issue we had with slow anti-virus scanning has now been resolved. May <var data-var='date'>11</var>, <var data-var='time'>18:06</var> BST Identified - We have identified the cause and are pushing out a fix now, we should see files become available as normal shortly as the AV scanning catches up. May <var data-var='date'>11</var>, <var data-var='time'>17:59</var> BST Investigating - We're currently investigating an issue affecting some customers who are trying to access attachments on emails. The attachments are not being virus scanned in time, resulting in them being inaccessible. We are actively investigating this issue and will update as soon as possible.

Issue with anti-virus scanning of attachments

Apr <var data-var='date'>12</var>, <var data-var='time'>04:31</var> BST Completed - The scheduled maintenance has been completed. Apr <var data-var='date'>12</var>, <var data-var='time'>03:00</var> BST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary. Apr <var data-var='date'> 5</var>, <var data-var='time'>21:42</var> BST Scheduled - Our Email Previews functionality, which allows customers to take screenshots of emails on real devices, will be subject to a short period of maintenance between 2AM-3.30AM UTC on April 12th, 2023. Email Previews clients will likely be unavailable during this service window. All other email testing functions will be unaffected.

Email Previews (email screenshot) Maintenance

Oct <var data-var='date'> 3</var>, <var data-var='time'>08:26</var> BST Resolved - This issue has now been resolved, effected customers should no longer experience any issues Oct <var data-var='date'> 3</var>, <var data-var='time'>07:59</var> BST Update - Customers are still reporting performance issues so our team will continue investigating Oct <var data-var='date'> 3</var>, <var data-var='time'>07:46</var> BST Investigating - Some customers are finding services are unavailable to them. We are investigating this issue at the moment.

Degraded performance

Aug <var data-var='date'>21</var>, <var data-var='time'>13:49</var> BST Resolved - This incident has been resolved. Aug <var data-var='date'>21</var>, <var data-var='time'>13:46</var> BST Update - Service for affected customers has been restored. As mentioned in our last update, we do not expect further interruptions. Aug <var data-var='date'>21</var>, <var data-var='time'>13:44</var> BST Monitoring - We became aware of an issue that was affecting some customers today, which meant we had to restart one of our database nodes at short notice. The downtime will be short-lived (a matter of minutes) and we do not expect this issue to repeat itself.

Service interruption for some customers

Aug <var data-var='date'>18</var>, <var data-var='time'>18:30</var> BST Resolved - We had a temporary internal connection issue which caused our service to temporarily go offline for some customers. Connectivity was quickly restored (within 15 minutes) and we're actively monitoring this now.

Services interrupted

May <var data-var='date'> 4</var>, <var data-var='time'>08:35</var> BST Resolved - All deployed and back to normal operations now May <var data-var='date'> 4</var>, <var data-var='time'>08:34</var> BST Monitoring - We're deploying a new version of our Dashboard will may result in up to 5 minutes of downtime of the UI only

Deploying new Mailosaur Dashboard

Mar <var data-var='date'>12</var>, <var data-var='time'>15:47</var> GMT Resolved - This incident has been resolved. Mar <var data-var='date'>12</var>, <var data-var='time'>14:06</var> GMT Monitoring - We have identified and rectified that issue that was causing degraded performance for some customers. All systems should be back to normal, but we continue to monitor them right now. Mar <var data-var='date'>12</var>, <var data-var='time'>12:52</var> GMT Investigating - We are currently investigating an issue causing degraded performance to some customers. We'll update you as soon as possible.

Jan <var data-var='date'> 2</var>, <var data-var='time'>06:40</var> GMT Completed - The scheduled maintenance has been completed. Jan <var data-var='date'> 2</var>, <var data-var='time'>05:00</var> GMT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary. Dec <var data-var='date'>20</var>, <var data-var='time'>10:53</var> GMT Scheduled - We will be performing some maintenance operations to our database infrastructure on Sunday, January 2 2022, between 05:00am and 07:00am UTC. Maintenance rarely impacts customers' use of the Mailosaur service, however while updates are made you may see some service disruption during this period of time.

Database maintenance

Nov <var data-var='date'>16</var>, <var data-var='time'>19:12</var> GMT Resolved - Things have remained stable since returning recently. We are marking this one as resolved. Nov <var data-var='date'>16</var>, <var data-var='time'>18:09</var> GMT Monitoring - It appears that services are operating again as normal. Our team are actively monitoring this at present. Nov <var data-var='date'>16</var>, <var data-var='time'>17:51</var> GMT Investigating - We are currently aware of an issue effecting our testing services. We believe this is the same issue effecting many other sites and apps around the world, potentially related to Google Cloud Platform. We will update further, as soon as we have more information.

Potential issues with Google Cloud Platform

Apr <var data-var='date'>25</var>, <var data-var='time'>07:30</var> BST Completed - The scheduled maintenance has been completed. Apr <var data-var='date'>25</var>, <var data-var='time'>07:00</var> BST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary. Apr <var data-var='date'>14</var>, <var data-var='time'>17:01</var> BST Scheduled - One of our databases is scheduled to undergo routine maintenance on April 25, 2021 at 06:00:00 UTC. Maintenance rarely impacts customers use of the Mailosaur service, however while updates are made, you may see some service disruption for a very brief window.

Nov <var data-var='date'>10</var>, <var data-var='time'>12:58</var> GMT Resolved - Due to a false positive in one of our monitoring tests, the API was incorrectly marked as offline. However, in fact, no services or customers were impacted.

API - false positive

Jul <var data-var='date'>22</var>, <var data-var='time'>23:57</var> BST Resolved - This incident has been resolved. Jul <var data-var='date'>22</var>, <var data-var='time'>23:09</var> BST Monitoring - Due to an error with a searching index, we had degraded performance across some SMTP servers this evening. We have now implemented a fix, which we are actively monitoring. Jul <var data-var='date'>22</var>, <var data-var='time'>22:08</var> BST Update - We are continuing to investigate this issue. Jul <var data-var='date'>22</var>, <var data-var='time'>20:12</var> BST Investigating - We are currently investigating this issue.

Degraded performance of SMTP

Jun <var data-var='date'> 5</var>, <var data-var='time'>09:46</var> BST Completed - The scheduled maintenance has been completed. Jun <var data-var='date'> 5</var>, <var data-var='time'>08:52</var> BST Verifying - Verification is currently underway for the maintenance items. Jun <var data-var='date'> 5</var>, <var data-var='time'>06:01</var> BST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary. May <var data-var='date'>28</var>, <var data-var='time'>07:52</var> BST Scheduled - We will be making some updates to our infrastructure, which require some downtime from 5am UTC (1am EST, 7am CET, 3pm ACT). This work should take no more than 4 hours to complete.

Infrastructure maintenance

Jun <var data-var='date'> 3</var>, <var data-var='time'>17:55</var> BST Resolved - This incident has been resolved. Jun <var data-var='date'> 3</var>, <var data-var='time'>16:49</var> BST Identified - We have identified an issue with emails received that have no text body within them. We are fixing this right now and should be back to normal very soon.

Problems with emails containing no text body

May <var data-var='date'> 5</var>, <var data-var='time'>10:01</var> BST Resolved - This incident has been resolved. May <var data-var='date'> 5</var>, <var data-var='time'>09:58</var> BST Update - We are continuing to monitor for any further issues. May <var data-var='date'> 5</var>, <var data-var='time'>09:58</var> BST Monitoring - A fix has been implemented and we are monitoring the results. May <var data-var='date'> 5</var>, <var data-var='time'>09:00</var> BST Identified - We are aware of an issue affecting API endpoints that create and update servers. Customers are currently receiving a 401 - Unauthorized error when calling these endpoints. Our team are aware of the cause and will be deploying a fix very shortly.

Errors when creating and editing servers

Apr <var data-var='date'>22</var>, <var data-var='time'>18:43</var> BST Resolved - We have now fully resolved the early issue. This was caused by a reference to a redundant container image, we do not expect any degradation in performance now, and all systems should be back to full operation. We apologise for any inconvenience. Apr <var data-var='date'>22</var>, <var data-var='time'>18:29</var> BST Identified - We have identified the cause of the issue, and are deploying a fix which will return full stability within the next few minutes. Apr <var data-var='date'>22</var>, <var data-var='time'>18:16</var> BST Investigating - We are currently investigating an issue impacting our API and SMTP endpoints. We will keep you updated.

Partial outage of services

Nov <var data-var='date'>30</var>, <var data-var='time'>17:18</var> GMT Resolved - An abnormal query was executed on a database instance which caused unusually poor performance and required a full restart on our part.  Systems came back online as expected and all tests passed fine before putting the system back online to users. We will be reviewing our procedures to ensure this cannot happen again. Nov <var data-var='date'>30</var>, <var data-var='time'>16:30</var> GMT Investigating - We are investigating database downtime. Please bear with us

Is Mailosaur down?

Mailosaur status is UP

Lastest published events

SMS deliverability issues for some customers

Some customers unable to forward emails

Service outage

Mailosaur Services, Components and Regions

Recent Mailosaur events

SMS deliverability issues for some customers

Some customers unable to forward emails

Service outage

Investigating issues with authentication and API services

Mailosaur UI is experiencing degraded performance

Intermittent connectivity issues for SMTP and POP3