Mesh Security incident

Microsoft issue: emails from hotmail.com addresses failing SPF

Notice Resolved View vendor source →

Mesh Security experienced a notice incident on August 18, 2023 affecting Inbound Email Security and Inbound Email Security, lasting 8h 12m. The incident has been resolved; the full update timeline is below.

Started
Aug 18, 2023, 08:51 AM UTC
Resolved
Aug 18, 2023, 05:04 PM UTC
Duration
8h 12m
Detected by Pingoru
Aug 18, 2023, 08:51 AM UTC

Affected components

Inbound Email SecurityInbound Email Security

Update timeline

  1. investigating Aug 18, 2023, 08:51 AM UTC

    We have received reports that some emails from hotmail.com addresses are being rejected for SPF fails. Upon investigation, these are correct rejects as they are coming from IP ranges not included in the SPF record for hotmail.com. This looks like a configuration issue by Microsoft and is not exclusive to Mesh.

  2. resolved Aug 18, 2023, 05:04 PM UTC

    It looks like Microsoft have now corrected this issue.