Hello, we would like to inform you that we will shortly enable the full enforcement of DMARC policies with p=reject across our entire email infrastructure (for our brands GMX.NET, WEB.DE, and mail.com<http://mail.com/>).
Once activated, incoming messages that fail DMARC validation and whose sending domain publishes a DMARC policy of p=reject will be rejected at the MTA/SMTP level, in accordance with the policy explicitly defined by the domain owner. This measure strengthens protection against spoofing, phishing, and brand abuse and aligns our approach with current industry best practices and the enforcement behaviour of major international mailbox providers. Recommendation Please ensure that the email traffic you operate or forward: * successfully passes DMARC validation, i.e. * at least one of the two mechanisms (SPF or DKIM) passes with correct DMARC alignment. Timeline The phased rollout of DMARC reject enforcement will begin in the coming weeks. Important note on DMARC reports We have been sending aggregate DMARC reports (rua) for an extended period of time. These reports already provide full transparency into authentication and alignment results and should be actively used to identify and remediate potential DMARC misconfigurations prior to full enforcement. Contact & further information For technical questions, please refer to our postmaster pages: * https://postmaster.gmx.net/en/case?c=r2001 * https://postmaster.web.de/en/case?c=r2001 * https://postmaster.mail.com/en/case?c=r2001 Kind regards, Mail Security Postmasters 1&1 Mail & Media GmbH -- Nikolas Bauer Senior Mail Security Engineer Mail Security Postmaster 1&1 Mail & Media GmbH | Brauerstraße 48 | 76135 Karlsruhe | Deutschland E-Mail: [email protected]<mailto:[email protected]> | Web: www.mail-and-media.com<https://www.mail-and-media.com/> www.gmx.net<https://www.gmx.net/> www.web.de<https://www.web.de/> www.mail.com<https://www.mail.com/> www.united-internet-media.de<https://www.united-internet-media.de/> Hauptsitz Montabaur, Amtsgericht Montabaur, HRB 7666 Geschäftsführer: Alexander Charles, Dr. Michael Hagenau, Thomas Ludwig, Dr. Verena Patzelt Member of United Internet Diese E-Mail kann vertrauliche und/oder gesetzlich geschützte Informationen enthalten. Wenn Sie nicht der bestimmungsgemäße Adressat sind oder diese E-Mail irrtümlich erhalten haben, unterrichten Sie bitte den Absender und vernichten Sie diese E-Mail. Anderen als dem bestimmungsgemäßen Adressaten ist untersagt, diese E-Mail zu speichern, weiterzuleiten oder ihren Inhalt auf welche Weise auch immer zu verwenden. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient of this e-mail, you are hereby notified that saving, distribution or use of the content of this e-mail in any way is prohibited. If you have received this e-mail in error, please notify the sender and delete the e-mail.
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