As mentioned by Google new guidelines here, bulk senders must authenticate their emails to ensure reliable source identification. Put simply, applying your DMARC helps to make sure your email campaigns reach your desired contact.
Along with SPF and DKIM verification, which happens in folk when you authenticate your email, DMARC is now one of the three required pillars of email security.
A DMARC record check aligns your email authentication protocols and provides ongoing reports of suspicious or harmful activity.
We recommend adding the following DMARC record to your DNS settings match the minimal requirements. The record should have the following format. Add the TXT record to your domain's DNS settings and save it.
v=DMARC1; p=quarantine; pct=100
After setting up DMARC, be sure check the DMARC configuration using this tool or in-app clicking on “Check DMARC”.
Additional questions
How to identify if I have an existing DMARC? Can I have multiple DMARC settings?
Each domain has only 1 DMARC setting.
If you already have an existing DMARC, you might want to edit it to match the required policy. You can use tools such as https://mxtoolbox.com/DMARCRecordGenerator.aspx to retrieve your current DMARC and update it.
What is the p=quarantine?
It specifies how the receiving server should treat emails that fail SPF and/or DKIM authentication. The policy options are:
'none': Do nothing, just collect and report data
'quarantine': Move unauthenticated emails to the spam or junk folder
'reject': Reject unauthenticated emails outright
What’s the DMARC policy's percentage?
This determines the percentage of your domain's email traffic to which the DMARC policy should be applied.