# IT:AD:DKIM #



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* See also:
  * [[IT/AD/SPF/]]
  * [[IT/AD/SMTP/]]
* See:
  * https://github.com/nicanorflavier/spf-dkim-dmarc-simplified


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## Summary ##

Gmail checks whether emails are correctly authenticated. If your messages are sent by a bulk mailing vendor or by third-party affiliates, please publish an SPF record that includes the IPs of the vendor or affiliates which send your messages and sign your messages with a DKIM signature that is associated with your domain.