Office 365 - Approve SendGrid to Send DMARC-Compliant Email from My Domain

This document will provide the steps necessary to set up custom domain authentication for SendGrid, approving SendGrid to send DMARC-compliant email from addresses in your organization's subdomain (e.g.

Information about the protection of UW-Madison email with DMARC can be found here: Email Authenticity

Note: approving a third-party email vendor to send email as/from addresses (e.g. is not permitted. Only approve third-party email vendors to send email as/from addresses in your subdomain (e.g.

SendGrid provides publicly available documentation on setting up custom domain authentication:

If you need assistance in taking the above steps, please email

See Also:

Keywords:domain based message authentication reporting conformance name system naming TXT SPF DKIM CNAME restrictive report forensic aggregate quarantine reject uw madison list server email header reply-to administrators smtp IP addresses caution external "[CAUTION: External]" tagging subject vendor newsletter campaign   Doc ID:89170
Owner:O365 S.Group:Office 365
Created:2019-01-18 13:59 CDTUpdated:2020-09-09 15:16 CDT
Sites:DoIT Help Desk, Office 365
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