Frequently Asked Question
Email marketing is only effective when your messages actually reach the inbox. With spam filters, spoofing threats, and increasingly strict authentication policies from providers like Gmail, Yahoo, and Outlook, proper email domain authentication is non-negotiable. If you're using MailerRocket.com, configuring SPF, DKIM, and DMARC records is one of the most essential tasks to secure your email deliverability.
In this detailed guide, you’ll learn what these records are, why they matter, and how to set up SPF, DKIM, and DMARC step-by-step for your custom sending domain on MailerRocket.
Why Email Authentication is Crucial for Your Campaigns
Without verified domain records:
Your emails may land in spam or be blocked entirely
ISPs may flag your domain as untrustworthy
You become vulnerable to phishing and spoofing attacks
Setting up SPF, DKIM, and DMARC not only boosts deliverability but also builds brand trust and protects your audience.