Sending Domains Subdomain vs Root Domain Guide

When you connect a domain to SureContact for sending emails or tracking links, you’ll be asked to use a subdomain (something like mail.yourdomain.com) rather than your main domain on its own (yourdomain.com).

This guide explains why we recommend a subdomain, what happens if you use your main domain instead, and answers to the questions we hear most often.

Our Recommendation

Use a subdomain such as mail, send, or email in front of your domain name – for example, mail.yourdomain.com- rather than your main domain by itself.

You’re not required to use a subdomain. Your main domain will work too. We simply recommend a subdomain because it protects the email you already have set up, for the reasons below.

Why We Recommend a Subdomain

1. It Won’t Interfere With Your Existing Email

Most businesses already send everyday email- invoices, password resets, staff email- through a service like Google Workspace or Microsoft 365. That setup already has settings tied to your main domain that tell other email services your messages can be trusted.

If SureContact needs to add its own settings to that same main domain, there’s a real chance those settings could accidentally conflict with what’s already there, which could stop your everyday business email from arriving. Using a separate subdomain keeps SureContact’s settings completely apart from your existing setup, so nothing about your current email needs to change.

2. It Keeps Your Sending Reputation Safe

Marketing emails and campaigns behave differently from personal, one-to-one email; they go out in bulk and naturally get more bounces and spam reports. Email providers pay close attention to this.

If your campaigns are sent from the same domain as your everyday business email, a campaign that performs poorly could hurt the delivery of your regular email too. Sending campaigns from a subdomain keeps that risk contained, so your everyday email stays protected even if a campaign underperforms.

3. No Extra Setup Required

You don’t need to do anything extra for a subdomain to be trusted by other email services. It automatically inherits the trust already established for your main domain.

4. The Same Applies to Tracking Links and Pages

If you’re connecting a domain for tracking email clicks or hosting pages, the same guidance applies: use a subdomain rather than your main domain.

If You’d Rather Use Your Main Domain

That’s fine; it will still work. Just keep a couple of things in mind:

• If you already send everyday business email from your main domain, a subdomain is the safer choice.
• If you’d rather not risk your everyday email being affected by a marketing campaign, a subdomain is the safer choice.
• If you go ahead with your main domain, make sure any new settings we ask you to add are combined with your existing settings rather than replacing them. Replacing them is the most common cause of everyday email breaking.

Common Questions

Why can’t I just use my main domain?

You can. A subdomain simply avoids conflicts with your existing email setup and keeps your sending reputation separate.

Do I need to set up anything extra for a subdomain to be trusted?

No. A subdomain automatically inherits the trust already set up for your main domain.

My regular email (Gmail or Outlook) stopped working after I connected SureContact.

This usually happens when new settings replace existing ones instead of being combined with them, or when everything was added to the main domain instead of a subdomain. Switching to a subdomain is the safest fix.

What subdomain should I use?

Any label works; common choices are mail, send, email, or campaigns.

Can I use the same subdomain for sending email and for tracking links?

Yes, though using separate subdomains for each can make things easier to manage down the road.

Need Help?

If you need any assistance, please email [email protected], and our support team will be happy to help you.