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down.guideby Sazabi
MailerSend
DWN-ce66fb1c50MailerSendResolved

We are experiencing a technical issue

Degraded Lasted 0m · started · MailerSend's page

Level
confirmed
Worst impact
Degraded
Down Index
8of 100

What to do

  • Check whether your product depends on MailerSend. Check your stack

    Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

  • Confirm your retries, queues and scheduled jobs caught up after the 0m it lasted.

    Anything that failed between 2026-02-19 15:35 UTC and 2024-04-15 18:07 UTC may need a replay.

  • Subscribe to MailerSend's feed to hear about the next one first. RSS feed

    https://down.guide/feed?provider=mailersend works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from MailerSend 4

  1. investigating

    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.

    provider

  2. investigating

    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.

    provider

  3. resolved

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

    provider

  4. resolved

    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

    provider

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Corrections

None so far.

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Questions about DWN-ce66fb1c50

Is MailerSend still down?

No, this incident was resolved 2024-04-15 18:07 UTC. For MailerSend's live state, see https://down.guide/mailersend.

How long did it last?

0m, from 2026-02-19 15:35 UTC to 2024-04-15 18:07 UTC, by the times MailerSend posted.

What caused it?

MailerSend hasn't published a root cause. If it does, it shows here.

Where does this come from?

MailerSend's official status page, https://status.mailersend.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.

Sources

Feed