Implementing SPF To set up SPF, you need to create a DNS TXT record for your domain. The record should list all the IP addresses that are authorized to send email on your behalf. For example: v=spf1 include:_spf.google.com ~all This record states that Google's servers are authorized to send email for your domain.
Implementing DKIM To set up DKIM, you need to generate a pair of cryptographic keys (public and private). The public key is added to your DNS records as a TXT record, while the private key is securely stored on your email server. When an email is sent, the server uses the private key to generate a digital signature, which is then added to the email header.
Implementing DMARC Setting up DMARC involves creating a DNS TXT record that specifies your domainâs DMARC policy. A simple DMARC record looks like this: v=DMARC1; p=none; rua=mailto:dmarc-reports@yourdomain.com This record tells receiving servers to send aggregate reports to dmarc-reports@yourdomain.com and not to take any action on emails failing DMARC checks (p=none).