Do you subscribe to non-Apache mailing lists and do these come through OK? Gary
On Fri, Apr 17, 2026 at 5:34 AM 2380189206 <[email protected]> wrote: > > I am writing to report an ongoing email deliver-ability issue that has been > preventing users from receiving emails from apache.org since at least May > 2025. > > Emails sent from Apache mailing lists (e.g., @ozone.apache.org, > @hadoop.apache.org, and other Apache project subdomains) are being blocked by > Outlook. The root cause appears to be that these emails are not carrying DKIM > signatures, which seems to have triggered Microsoft's security policies > implemented around April 2025 ( > https://techcommunity.microsoft.com/blog/microsoftdefenderforoffice365blog/strengthening-email-ecosystem-outlook%E2%80%99s-new-requirements-for-high%E2%80%90volume-senders/4399730 > ). > > This issue was first reported by users on Microsoft's community forum ( > https://learn.microsoft.com/en-us/answers/questions/4722114/unable-to-receive-emails-from-******@ozone-apache > ) as early as June 2025. In this post, the user confirmed that he stopped > receiving messages suddenly in June 2025, and standard troubleshooting (safe > sender lists, checking junk folders) did not resolve the issue, indicating it > is not an isolated incident but a systemic infrastructure conflict between > Apache's email setup and Outlook's filtering rules. > > As of today (April 2026), this problem persists ( > https://www.reddit.com/r/Outlook/comments/1smr1x7/anyone_else_having_issues_subscribing_to_apache/ > ). This blockage is severely disrupting communication for developers and > users who rely on these mailing lists for critical project updates and > support. --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
