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Email Source: Cisco IronPort Hosted MX


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: Outbound clients can use SPF to emit DMARC-compliant email.

DKIM: Contact Cisco for support.

SPF: Contact Cisco for support.


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.