• Configure SPF records

  Create a TXT record containing this text: v=spf1 include:_spf.google.com ~all. If you are sending email from your server (e.g. a web application sending emails through postfix server configured on your cloud), you need to add it’s IP address as well, like so, v=spf1 ip4:192.168.10.10 include:_spf.google.com ~all

• DKIM Related Configuration

  1. Generate domain key in Google Apps Admin Console. (Instructions)
  2. Add the above generated key as a TXT record value in your domain’s zone file. DNS Host Name/ TXT record name should be google._domainkey.your_domain.com
  3. Turn on Email Signing from the screen of first step

• DMARC Record

  In your domain’s zone file, add a TXT record named, _dmarc.your_domain.com. The value of TXT record should be like v=DMARC1;p=quarantine;pct=20;rua=mailto:info@your_domain.com;sp=reject;aspf=r

Note: Replace text in red with the values appropriate to your settings