[German]In future, Microsoft will specify new requirements for sending bulk emails in Outlook. For domains that send more than 5,000 emails per day, Outlook will soon require compliance with SPF, DKIM and DMARC. Non-compliant messages will initially be sent to junk. If the issues remain unresolved, they may eventually be rejected.
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Even though I read an IBM prediction years ago that email was dead, this form of communication continues to enjoy unbroken popularity. However, there are also downsides in the form of SPAM and phishing.
At a time when email is one of the most widely used tools for personal and business communication, Microsoft is increasing its commitment to protecting inboxes and maintaining trust in this medium in Outlook. Therefore, Microsoft has announced new requirements and best practices to strengthen email authentication for domains that send more than 5,000 emails per day.Microsoft will specify new requirements for sending bulk emails in Outlook. For domains that send more than 5,000 emails per day, Outlook will soon require SPF, DKIM and DMARC compliance. Non-compliant messages will initially be sent to junk. If the issues remain unresolved, they may eventually be rejected.
I came across the topic via the following tweet a few days ago. Microsoft has already published the topic on April 2, 2025 in the Techcommunity article Strengthening Email Ecosystem: Outlook's New Requirements for HighโVolume Senders.
Accordingly, SPF, DKIM and DMARC will become mandatory for sending to Outlook, Live and Hotmail.
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- ๐. ๐๐๐
(๐๐๐ง๐๐๐ซ ๐๐จ๐ฅ๐ข๐๐ฒ ๐
๐ซ๐๐ฆ๐๐ฐ๐จ๐ซ๐ค)
– Must exist for the sending domain.
– Your domain's DNS record should accurately list the authorized. - ๐. ๐๐๐๐ (๐๐จ๐ฆ๐๐ข๐ง๐๐๐ฒ๐ฌ ๐๐๐๐ง๐ญ๐ข๐๐ข๐๐ ๐๐๐ข๐ฅ)
– Must exist to verify the integrity and authenticity of the email. - ๐. ๐๐๐๐๐ (๐๐จ๐ฆ๐๐ข๐ง-๐๐๐ฌ๐๐ ๐๐๐ฌ๐ฌ๐๐ ๐ ๐๐ฎ๐ญ๐ก๐๐ง๐ญ๐ข๐๐๐ญ๐ข๐จ๐ง, ๐๐๐ฉ๐จ๐ซ๐ญ๐ข๐ง๐ , ๐๐ง๐ ๐๐จ๐ง๐๐จ๐ซ๐ฆ๐๐ง๐๐)
– At least p=none and match either SPF or DKIM (preferably both).
From May 5, 2025, non-compliant messages from high-volume domains (more than 5,000 emails per day) will initially be routed by Outlook to the junk folder. This is to give senders the opportunity to resolve any outstanding issues. If the issues remain unresolved by the sender, the messages may eventually be rejected.
Microsoft recommends that all senders, especially those who send a lot, review and update their SPF, DKIM and DMARC records in preparation for the start of enforcement in May.
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