Frequently Asked Question

In the world of email marketing, deliverability is everything. Even the most brilliantly written campaigns fall flat if they never reach your audience’s inbox. One of the most crucial steps to ensure your emails land where they’re supposed to is authenticating your sending domain. If you’re using MailerRocket.com, a powerful platform designed for automated email marketing and campaign management, setting up a custom sending domain is essential.

In this guide, we’ll walk you through how to add a sending domain in MailerRocket step-by-step, helping you establish trust with ISPs, improve inbox placement, and boost your sender reputation.

What is a Sending Domain and Why is It Important?

A sending domain is the domain name that appears in your email's "From" address (e.g., hello@yourdomain.com). By verifying and authenticating this domain through protocols like SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and optionally DMARC (Domain-based Message Authentication, Reporting, and Conformance), you're telling recipient mail servers, "Yes, I’m authorized to send on behalf of this domain."

Benefits of adding a sending domain in MailerRocket:

• Increased email deliverability

• Fewer emails ending up in Spam or Promotions

• Builds domain reputation

• Prevents spoofing or phishing attempts using your domain

• Boosts trust with Gmail, Outlook, Yahoo, etc.

Prerequisites Before Adding Your Domain

Before getting started, make sure you have:

• Access to your domain registrar (GoDaddy, Namecheap, Cloudflare, etc.)

• A domain name you control (e.g., yourcompany.com)

• Admin access to MailerRocket.com

• Ability to add DNS records

Step-by-Step Guide: Adding a Sending Domain on MailerRocket

Step 1: Log Into MailerRocket Dashboard

1. Go to www.mailerrocket.com and log in using your admin credentials.

2. From the dashboard, navigate to the Settings or Sending Domains section (depending on your account structure).

Step 2: Click “Add New Domain”

1. Click on “Add Sending Domain”.

2. Enter the domain you want to use for sending (e.g., example.com) – do not include the “www” or any subdomain.

3. Click Submit or Next to proceed.

Step 3: Verify Domain Ownership via DNS Records

MailerRocket will now generate a set of DNS records for domain verification and email authentication:

• SPF Record (TXT)

• DKIM Record (TXT)

• Optional CNAMEs or Tracking Domains (for click/open tracking)

Copy each record exactly as shown.

Step 4: Add Records to Your DNS Provider

1. Log into your domain registrar (GoDaddy, Cloudflare, Namecheap, etc.)

2. Navigate to DNS Management or Zone Editor

Note:

• Use @ to represent the root domain.

• Ensure there are no duplicate SPF records (you can merge values if needed).

Step 5: Confirm the DNS Setup in MailerRocket

1. Once records are added and propagated (can take 5–30 minutes), go back to MailerRocket.

2. Click on “Verify Domain”.

3. If all records are correct and live, you will see green check marks and a success message.

If verification fails, double-check:

• Spelling

• DNS record types (TXT vs CNAME)

• Value formatting

• Any existing conflicting records 

Step 6: Start Sending Authenticated Emails

Once your domain is verified and authenticated, you’re ready to send high-deliverability campaigns:

• Use you@yourdomain.com in the “From” address

• Add a branded signature and reply-to email

• Monitor deliverability from the MailerRocket reports dashboard

Pro Tips for Optimizing Your Sending Domain Setup

• Warm up your domain by sending to engaged users first

• Use double opt-in to avoid spam complaints

• Avoid spam trigger words in subject lines

• Monitor blacklist databases using tools like MXToolbox

• Rotate or manage IPs if you’re on a dedicated sending plan

Troubleshooting Common Issues

Conclusion

Adding a verified sending domain in MailerRocket is not just a technical checkbox—it’s a foundational step for serious email marketers who care about deliverability, branding, and long-term inbox success. By correctly configuring SPF, DKIM, and optional DMARC records, you build a rock-solid foundation that helps MailerRocket do its best work: reaching your subscribers with the emails they actually want.