[Transactional Email] - Low IP reputation with Microsoft servers

What to do

• Check whether you use Scaleway Transactional Email. 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 41d 22h it lasted.

  Anything that failed between 2026-02-27 09:33 UTC and 2026-04-10 07:51 UTC may need a replay.

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

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

Updates from Scaleway 2

1. identifiedFeb 27, 2026, 9:33 AM UTC

   We are noticing an increase in issues with Microsoft, with the message: "temporarily rate limited due to IP reputation." Our team is already taking action to mitigate the issue, but you may notice some delays and retries when sending to Outlook, MSN, or Hotmail. Microsoft has acknowledged the issue and is currently investigating on their side.

   provider

2. resolvedApr 10, 2026, 7:51 AM UTC

   Customers may have experienced delays when sending emails to Microsoft domains (Outlook, MSN, Hotmail) due to temporary rate limiting. The issue has been resolved and email delivery should now be operating normally.

   provider

Corrections

None so far.

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