From the time an email is sent to the point when it arrives in your inbox, DMARC, SPF and DKIM work together to ensure authentication in three simple steps.
If your organization is using Office 365, then the following Microsoft sites should be used to setup your domains SPF, DKIM and DMARC records.
- Setup SPF in Office 365 – https://technet.microsoft.com/en-us/library/dn789058(v=exchg.150).aspx
- DKIM – https://technet.microsoft.com/en-us/library/mt695945(v=exchg.150).aspx
Microsoft and DMARC – https://technet.microsoft.com/en-us/library/mt734386(v=exchg.150).aspx
If your organization is using Google’s mail servers, then the following Google support guides should be used to setup your domains SPF, DKIM and DMARC records.
- Configure SPF records to work with Google Apps – https://support.google.com/a/answer/178723?hl=en
- Google – About DKIM – https://support.google.com/a/answer/174124?hl=en
- Google – About DMARC – https://support.google.com/a/answer/2466580?hl=en
Sender Policy Framework (SPF)
DomainKeys Identified Mail (DKIM)
Domain-Based Message Authentication (DMARC)