Mailchimp no longer uses the SPF mechanism `include:servers.mcsv.net`. This change eliminates the need to add Mailchimp to your SPF DNS record.
Emails sent through Mailchimp typically fail SPF alignment since they are sent from a third-party domain, not your original domain. This makes adding Mailchimp to your SPF unnecessary.
Instead, ensure you set up DKIM with your DMARC configuration. DMARC passes if either SPF or DKIM alignment succeeds, so even if SPF fails, DKIM can still authenticate your emails.
For more detailed information, refer to our Mailchimp email authentication setup guide.
