Implementing sender verification involves configuring your domain's DNS records to include SPF, DKIM, and DMARC settings. Here’s a brief overview:
SPF: Add an SPF record to your domain's DNS settings. This record should list all the IP addresses authorized to send emails on behalf of your domain. DKIM: Generate a DKIM key pair (public and private). Add the public key to your DNS records and configure your email server to sign outgoing emails with the private key. DMARC: Create a DMARC policy that specifies how mail servers should handle emails that fail SPF or DKIM checks. Add this policy to your DNS records.