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DomainKeys Identified Mail and Yahoo Mail

We want you to feel safe when opening your email. Yahoo Mail fights email forgery with DomainKeys Identified Mail (DKIM) so you can open your email with confidence.

DKIM lets senders digitally sign their emails sent to Yahoo Mail accounts, associating the digital signature with the actual domain name of that organization.

This enables Yahoo Mail to verify the sender's authenticity and encrypts the message so its origin (domain) can be checked.

Learn more about DomainKeys Identified Mail: Visit

If you're having trouble sending email to Yahoo Mail accounts, our overview of industry standards and best practices for senders will provide some insights.