Avoid email rejection: Navigating Microsoft’s DMARC requirements
As of April 2, 2025, Microsoft joined Google and Yahoo in requiring authentication (DMARC, SPF, DKIM) for domains sending over 5,000 daily emails to Outlook, Live, and Hotmail. These rules state that brands must have DMARC, SPF & DKIM in place or emails will be rejected.
- Ensure emails pass SPF and DKIM checks
- Have a valid DMARC record
- Additional recommendations:
- Provide easy unsubscribe options
- Use valid ‘From’ email address that accept replies
- Avoid misleading subject lines and headers
- Maintain clean email lists by removing invalid recipients
Why DMARC:
Exploring the powerful email authentication best practice
High-profile organizations have recognized a need for Domain-based Message Authentication, Reporting and Conformance (DMARC) for over a decade, since beginning work to establish it as a global standard in 2011.
The modern digital landscape, with its ever-rising and strengthening cyberthreats has driven massive enterprises, regulatory bodies, and governments worldwide to either strongly recommend or mandate DMARC in recent years.
150 %
There's been a 150% rise in phishing attacks per year since 2019
84 %
Surging threats led to an 84% growth in valid DMARC policies in 2021 with annual adoption rates steadily increasing since
2X
The amount of brand names spoofed has almost doubled in recent years
Is your organization safe? Check your domain here
Sendmarc has developed an algorithm that rates an organization’s exposure to fraudulent email activities such as impersonation, phishing and spoofing, and the risk their current domain poses to the cybersecurity of their company. Simply enter your email address and check your score, it only takes a few seconds.
If you’re at risk of impersonation, one of our experts will be in touch to assist.
Tap into expertise for turbocharged DMARC benefits
The details of implementing Microsoft’s new sender rules for email authentication may seem overwhelming, but you don’t need to embark on your journey to compliance alone.
Leverage Sendmarc, a leading DMARC implementation and management specialist to comply simply and reap the standard’s benefits across various teams in your business.
Information Technology
Maximize productivity
DMARC reports compile data from worldwide servers into actionable insights and provide visibility of who's sending emails from your domain. This accelerates threat investigations and management of spam complaints.
Strengthen security
Prevent the unauthorized use of your domain name to send fraudulent emails, stopping phishing, spoofing, and impersonation from reaching the inboxes of internal and external stakeholders.
Streamline email governance
DMARC empowers IT teams to enforce email governance policies and best practices across the organization. This ensures consistency of email authentication policies and integrity of email communications, ultimately boosting trust.
Sales & Marketing
Improve inbox access
DMARC helps ensure that every legitimate email from your domain reaches the intended inbox, providing peace of mind that campaigns will perform optimally.
Protect brand reputation
A phishing or spoofing attack can hugely damage brand trust and reputation, which is challenging – or even impossible – to repair. DMARC ensures that every email bearing your brand name is the real thing.
Increase ROI
DMARC supercharges your email deliverability, which means more eyes on your messaging, more often. This means you can maximize ROI and avoid getting lost in Spam or Junk folders.
Elevate brand recognition
Once DMARC is in place, you can implement Brand Indicators for Message Identification (BIMI), which boosts brand visibility and recognition by allowing for the display of your logo beside emails in inboxes.
Customer Success
Faster resolution = happier customers
With reliable email delivery, customer success teams can promptly respond to inquiries and resolve issues. This enhances customer satisfaction and boosts loyalty.
Strengthened customer engagement
DMARC ensures that emails are delivered, enabling you to proactively reach out to customers with helpful information, support updates, or personalized offers. This bolsters customer engagement and drives success.
Enhanced communication
DMARC provides prime placement of your communications in inboxes, preventing emails from landing in Spam or Junk folders, or being rejected entirely.
What our customers have to say
Sendmarc's DMARC solution was a game-changer
“As a major retailer with an e-commerce presence, the integrity of our customer communication is paramount. The implementation of Sendmarc’s DMARC solution was a game-changer, giving us the visibility and control needed to move swiftly to enforcement, blocking volumes of malicious phishing and spoofing emails that threatened our brand reputation and operations. This has led to a noticeable decrease in fraudulent emails, thereby safeguarding our customers, while also enhancing the deliverability of legitimate marketing and transactional emails, which is a critical factor in driving better conversion rates. Sendmarc provides an essential security layer that protects our brand and reinforces customer trust in our business.”
Kim SimChief Information Officer at Mr Price Group
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