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Email Source: Microsoft Office 365


Known to forward email? yes

DMARC Capabilities

Capable of generating DMARC compliant email for others? yes

Capable of signing email with DKIM for others? yes

Capable of sending SPF compliant email for others? yes

Notes on Capabilities

DMARC: Domains hosted with Microsoft can be configured to use the hosted domain in the envelope address. This allows SPF to apply to DMARC checks.

DKIM: DKIM can be configured for Office 365. See:

SPF: Some SPF-specific information here:


When deploying DMARC, domain owners often find new sources of email.

Domain owners then wonder if the source is capable of sending DMARC compliant email.

This directory contains information on the capabilities of various sources of email.