Is MailerSend Down Right Now? Check if there is a current outage ongoing.

We are currently experiencing a service disruption due to a global outage affecting Google Cloud Platform (GCP), which is one of our core infrastructure providers. The Google Cloud outage is causing some instability across our app, including degraded performance and partial service outages. This is an external infrastructure issue, but it is directly impacting our ability to serve requests reliably. The incident is global and being actively investigated by Google. You can follow their updates here: https://status.cloud.google.com/

We will be carrying out scheduled maintenance for our infrastructure. The planned maintenance is expected to last no more than 15 minutes.This means that you might experience email sending delays during this time. We appreciate your understanding and patience during the scheduled maintenance period and apologize for any inconvenience that this may cause.

Scheduled maintenance is currently in progress. We will provide updates as necessary.

The incident has been resolved.

The fix has been deployed. The incident did not impact deliverability—it only caused an incorrect status label to be displayed. We’re currently monitoring and processing the queue successfully. All deliverability statuses are expected to be displayed correctly within the next 30 minutes.

We have identified the fix and are monitoring

We're currently seeing an issue where the ​Delivered​ status isn't updating in MailerSend. Emails are still sending and delivering as expected — this is just a reporting issue. Sorry for the confusion this might've caused! We're working on a fix and will update here once it's resolved.

We're currently seeing an issue where the ​Delivered​ status isn't updating in MailerSend. Emails are still sending and delivering as expected — this is just a reporting issue.Sorry for the confusion this might've caused! We're working on a fix and will update here once it's resolved.

This incident has been resolved.

An application outage of 3 minutes happened around 2:45 PM UTC. A fix has been implemented, the application and API are running as expected now and we are monitoring the results.

This incident has been resolved.

We are experiencing a latency issue that may cause delays for some but not all users. Our engineers are working hard to resolve the issue. We are grateful for your patience.

We want to acknowledge and apologize for an issue that caused delays in webhook deliveries. The issue began at approximately 2024-12-02 16:30 UTC and was resolved at 2024-12-02 22:00 UTC. The system is now fully operational.

Our team successfully identified and patched the underlying problem, and the incident has been resolved. Thank you for your patience, The MailerSend team

We are experiencing a technical issue that might cause some delays while using the bulk email endpoint and webhooks. All of our engineers are working hard to fix the issue as soon as possible. Thank you for your understanding, The MailerSend team

Deliverability rate should be back to normal.

A fix has been implemented, new emails should not be deferred.

We are aware of an issue that is currently affecting our email delivery to GMail accounts. Due to a rate-limiting issue, emails sent to GMail addresses are being deferred, resulting in delays in delivery. Our engineers are actively investigating the cause of this rate-limiting issue and are working diligently to resolve it as quickly as possible. We understand the frustration and inconvenience this may cause, and we deeply apologize for any disruptions this issue may have created for you or your business.

The problem should be resolved now, sorry for the inconvenience.

We are experiencing a technical issue with the deferrals for emails sent to Gmail domains that may prevent some users from delivering emails to certain Gmail recipients. The emails will be delivered normally once the issue is fixed. Our engineers are working hard to resolve the issue within the next couple of hours (rough estimate). We are grateful for your patience.

We have recently encountered technical difficulties that have affected the accuracy of email activity reporting within our platform. Between May 18 05:15 UTC to May 19 16:05 UTC, some users may have experienced delayed email activity reporting and inaccuracies in the timestamp on delivered activity statuses. Upon thorough investigation, we have determined that these issues stemmed from our mail transfer agent delivery report delay (email delivery was not impacted). This unforeseen challenge resulted in disruptions to our usual service standards, for which we sincerely apologize. We understand the importance of timely and accurate email communication for your operations, and we recognize the impact that these issues may have had on your experience. Please know that addressing these challenges is our top priority, and we believe that we have diligently worked towards resolving this. Your trust in our service means everything to us, and we are committed to earning back your confidence by delivering the dependable performance you expect and deserve. Should you have any questions or concerns, please do not hesitate to reach out to our support team. We are here to assist you in any way we can.

Today, we encountered technical challenges that led to delays in email delivery and discrepancies in activity reporting. Specifically, between 08:00 UTC and 12:00 UTC, some users may have experienced delays in sending emails, and our activity reporting system may have provided inaccurate information. Upon identifying these issues, our team immediately sprung into action and we deployed multiple solutions to fix said problems. We understand the frustration and inconvenience that delayed email delivery and inaccurately reported activity statuses can cause, especially when you rely on our platform for important communications. We want to sincerely apologize for the recent disruptions you may have experienced. An apology may not mean much, but please know that our entire team is committed to preventing similar incidents in the future.

We experienced slowdowns in sendings, on our single and bulk email endpoints. This affected a few accounts for around 2 hours. Our team investigated the issue and found that our sending servers had a memory leak. After the restart, the slowdowns were reduced, and the speed of sending went back to normal. For the past few weeks, we have been working on a more scalable sending infrastructure, and we plan to roll it out this week. This will address these problems so they do not happen again. We understand you have emails to deliver, and an apology will not mean much right now. We wanted to be transparent and let you know that we are 100% focused on fixing the issue and improving our product. Thank you for your understanding, The MailerSend team

The technical issue has been resolved. The email sending are back to normal. Thank you so much for your patience.

We are continuing to investigate the issue. The /email endpoint is also showing signs of delayed sending. Emails are queued and sent, but the delivered event is being delayed.

We are experiencing a technical issue with bulk sending that cause a delay in email sending. Our engineers are working hard to resolve the issue within the next couple of hours. We appreciate your patience.

We experienced a technical issue that caused delays while using the bulk endpoint. The bulk-sending feature was down between 12:50 UTC and 15:12 UTC on April 10th and between 11:24 UTC and 12:16 UTC on April 11th. We released a new version of the app at 12:50 UTC, and then, 20 minutes after the release, we identified an error and started working on a fix. At 15:12 UTC, we decided to revert to the last stable version. Around 15:58 UTC, the slowdown in the bulk sending was identified, and we started investigating. We had an unusual high load, which was slowing down the sending. At 11:24 the next day, we released a hotfix to handle this larger load by implementing a stricter retry mechanism. This amounts to 3h14 of slowdown. We understand that you have emails to deliver and an apology will not mean much right now. But we wanted you to know that we are 100% focused on fixing all issues and ensuring this doesn’t happen in the future. Thank you for your understanding, The MailerSend team

The slowdown was absorbed.

We are continuing to work on a fix for this issue.

Due to an unexpectedly high sending load, we're experiencing some delays in email delivery. Emails are still being sent. This should return to normal in a few minutes.

The incident was solved. You should no longer receive 401 errors when calling the API.

We are experiencing a technical issue that might result in 401 errors while using the API. All of our engineers are working hard to fix the issue as soon as possible. We understand that you have emails to deliver and an apology will not mean much right now. But we wanted you to know that we are 100% focused on fixing the issue and ensuring this doesn’t happen in the future. Thank you for your understanding, The MailerSend team

Some of our users experienced a service interruption today between 4:30 and 5:10pm (GMT+2) when connecting to our SMTP proxy. After investigation, we found out the certificate on our SMTP proxy caused some clients problems when connecting, resulting in TLS-related exceptions being reported. The issue has now been resolved. We sincerely apologize for the inconvenience. Thank you for your understanding, The MailerSend team

This incident has been resolved.

SMTP is now operational.

We experienced a technical issue during our release, which caused an outage on our sending servers. Our engineers worked on a fix as soon as we identified the root cause. This incident happened at 10:36 am UTC+2 and resulted in losing emails sent with our SMTP relay. We apologize for this downtime. We know you have emails to deliver, so we have been 100% focused on resolving this and preventing future issues. You can check the status page for regular updates. We appreciate your understanding, The MailerSend team

We are sorry to inform you that all existing email activity data has been lost. All new data is in place, and email activity functionality works now. Please do contact our support if you need assistance.

We had a downtime on one of our backend database servers. The problem has been fixed.

This incident has been resolved.

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

The technical issue has been resolved. The App is back to normal. Thank you so much for your patience.

We are working on a remedy, team will provide details at a later time.

Analytics data is delayed at this time, our development team is working on a solution.

Services are operational and we are monitoring the situation.

We are applying measures to stop any further issues.

We reverted our latest release and continue monitoring any performance degradation. The activity page might have some latencies. Our team is still investigating what is causing it.

We detected the problem with our latest release and the team is investigating what is causing it. We will update our status page as soon as we have more information.

We are experiencing a technical issue in the MailerSend app that may affect some users. Our team is working to fix the issue as soon as possible. We will update the status page as it's resolved.

We had an unexpected downtime due to a data migration. It has been resolved, apologies for any inconvenience caused.

This incident has been resolved.

We are experiencing a technical issue that might cause some delays while using the app. All of our engineers are working hard to fix the issue as soon as possible. We understand that you have emails to deliver and an apology will not mean much right now. But we wanted you to know that we are 100% focused on fixing the issue and ensuring this doesn’t happen in the future. Thank you for your understanding, The MailerSend team

This incident has been resolved.

We are experiencing a technical issue that might cause some delays while using the app. All of our engineers are working hard to fix the issue as soon as possible. We understand that you have emails to deliver and an apology will not mean much right now. But we wanted you to know that we are 100% focused on fixing the issue and ensuring this doesn’t happen in the future. Thank you for your understanding, The MailerSend team

This incident has been resolved.

We are experiencing a technical issue that might cause some delays while using the app. All of our engineers are working hard to fix the issue as soon as possible. We understand that you have emails to deliver and an apology will not mean much right now. But we wanted you to know that we are 100% focused on fixing the issue and ensuring this doesn’t happen in the future. Thank you for your understanding, The MailerSend team

The incident was resolved, no emails have been lost during the process.

We are experiencing a technical issue in the MailerSend app: the dashboard is unavailable. Our team is working to fix the issue as soon as possible. We will update the status page as it's resolved. None of the other pages are affected and emails are still being processed.

Users have faced a lot of 500 server errors from 2:46 am UTC on the morning of 10th Oct, 22. SRE has been paged at 4:31 am UTC and noticed it was a storage issue. The storage caused errors while creating new files in storage for cache or message content, etc. Our SRE team started cleaning up the storage at 4:57 am UTC and put mitigation measures in place so storage utilization would be better managed and would send alerts in case of failure.

Users were facing 500 server errors on the API and SMTP connections and as a result, were unable to send some emails. The issue has been resolved. Thank you so much for your patience. We sincerely apologize for the inconvenience. A full explanation of what happened is on the way.

The technical issue has been resolved. The App is back to normal. Thank you so much for your patience.

The issue has been temporarily fixed and is now being monitored, we are waiting for updates from our third-party service. If you are still experiencing issues, please contact customer support via live chat or info@mailersend.com.

The issue has been identified and has been caused by a third-party storage service provider. We are actively working on implementing a solution and will let you know when the fix has been released.

We are experiencing a technical issue causing email sending outage with API and SMTP as well as access to the whole app. All of our engineers are working hard to fix the issue as soon as possible. We apologize for this downtime. We know that you have emails to deliver, so we're 100% focused on resolving this and preventing future issues. You can check the status page for regular updates. Thank you for your understanding, The MailerSend team

We experienced a technical issue in the MailerSend app that may have caused problems for some users. The issue has been fixed. We apologize for any inconvenience.

We experienced a technical issue in the MailerSend app that may have caused problems for some users. The issue has been fixed. We apologize for any inconvenience.

We are currently investigating this issue.