Addressing DMARC issues with Mailchimp, Woodpecker, and O365 involves a comprehensive approach. It begins with configuring custom DKIM for Mailchimp and ensuring the SPF record correctly includes Mailchimp's domain and the O365 include if sending via Woodpecker. A DMARC record must be created in your domain's DNS settings. Monitoring sending and domain reputation is vital. Implementing DMARC requires correct SPF and DKIM configuration, and choosing an appropriate DMARC policy. Testing email authentication and regularly monitoring DMARC reports are crucial. Addressing common errors, verifying DMARC alignment, checking for organizational overrides, using SPF flattening, and considering testing on subdomains are key considerations.
8 marketer opinions
Several key steps and considerations are involved in resolving DMARC issues with Mailchimp, Woodpecker, and O365. Proper SPF and DKIM configuration are essential, followed by the creation of a DMARC policy. DMARC alignment with SPF or DKIM needs verification, ensuring the 'From' address domain matches the authentication domains. Organizations should check for overriding DMARC policies. Email authentication should be tested, and DMARC reports should be monitored regularly to address deliverability issues. DMARC policies should be carefully chosen to protect domain reputation, and common errors like incorrect syntax or misconfigurations should be troubleshooted. SPF flattening can help avoid DNS lookup limits, which also affect DMARC compliance.
Marketer view
Email marketer from DMARC Analyzer emphasizes the importance of regularly monitoring DMARC reports to identify and address deliverability issues, spoofing attempts, and other email security threats.
10 Mar 2025 - DMARC Analyzer
Marketer view
Email marketer from Email on Acid advises that after setting up SPF, DKIM, and DMARC, testing the email authentication is important to identify any issues. They suggest using email testing tools to check the authentication results.
14 Jan 2025 - Email on Acid
5 expert opinions
Fixing DMARC issues with Mailchimp, Woodpecker, and O365 involves several key actions. Setting up custom DKIM for Mailchimp is crucial. Ensuring the correct SPF record is in place, reflecting Mailchimp's own domain, is vital for DMARC alignment. Maintaining the include for Outlook SPF records is necessary if sending mail through Woodpecker connected to O365. DMARC implementation on subdomains can serve as a testing ground before full deployment. Monitoring sending and domain reputation is paramount, as a poor reputation can undermine even the most technically sound DMARC configurations.
Expert view
Expert from Email Geeks points out that the SPF record is incorrect because Mailchimp uses its own domain in SPF, which is important for DMARC alignment via custom DKIM.
9 Feb 2022 - Email Geeks
Expert view
Expert from Email Geeks confirms that the include:<http://spf.protection.outlook.com|spf.protection.outlook.com> is necessary because mail is being sent from Outlook through Woodpecker.
11 Jun 2025 - Email Geeks
4 technical articles
Resolving DMARC issues with Mailchimp, Woodpecker, and O365 involves creating a DMARC record in your domain's DNS settings as guided by Mailchimp. It also requires configuring DKIM records for your custom domain in Office 365 using the Microsoft 365 Defender portal or PowerShell, as detailed in Microsoft's documentation. Setting up DKIM correctly for Woodpecker is essential for email authentication and improved deliverability, and instructions are available in Woodpecker's DKIM setup guide. Properly configuring DNS records using a provider like Cloudflare ensures that SPF, DKIM, and DMARC function correctly, including ensuring that those records are correctly entered and propagated.
Technical article
Documentation from Cloudflare explains how to properly configure DNS records, which is critical for SPF, DKIM, and DMARC. Ensure the records are correctly entered and propagated across the DNS.
4 Jul 2023 - Cloudflare
Technical article
Documentation from Woodpecker shares that properly setting up DKIM is essential for Woodpecker to authenticate emails and improve deliverability. Follow their DKIM setup guide to create and add the DKIM record to your DNS.
16 Sep 2024 - Woodpecker
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