Email marketing remains one of the most effective ways to engage customers, promote products, and drive repeat sales. However, even the best-designed campaigns cannot succeed if emails never reach your customers’ inboxes.
One of the most important factors affecting email deliverability is domain authentication.
What Is Domain Authentication?
Domain authentication is a process that verifies that a sender is authorized to send emails on behalf of a domain.
When email providers such as Gmail, Outlook, and Yahoo receive a message, they perform authentication checks to determine whether the sender is legitimate. These checks help protect users from spam, phishing attacks, and email spoofing.
By authenticating your domain, you tell receiving mail servers that FastCommerce is authorized to send marketing emails on behalf of your business.
Why Authentication Is Important
Without domain authentication, email providers have less confidence that your messages are legitimate.
As a result, unauthenticated emails are more likely to:
- Be delivered to spam or junk folders
- Be rejected by receiving mail servers
- Experience lower delivery rates
- Appear less trustworthy to recipients
Authentication helps improve inbox placement, strengthens your sender reputation, and increases customer confidence in your emails.
Why Some Emails Are Sent From a FastCommerce Address
Modern email providers have become increasingly strict about sender authentication requirements.
To help ensure reliable email delivery, FastCommerce only sends campaigns through authenticated domains.
If you use a public email address such as Gmail, Yahoo, Outlook.com, or Hotmail, that address cannot be authenticated because public email providers do not allow custom sender authentication.
Similarly, if you use your own business domain but have not completed domain authentication, FastCommerce cannot verify that it is authorized to send emails on your behalf.
In either situation, FastCommerce automatically sends your campaigns using a FastCommerce-managed sender address, such as:
store+12345@fastcommercemail.com
This approach allows emails to be sent through an authenticated domain, helping improve deliverability and reducing the likelihood of messages being blocked or marked as spam.
What Are the Benefits of Using Your Own Authenticated Domain?
When you authenticate your domain, your emails can be sent using your own branded sender address, such as:
marketing@yourcompany.com
instead of a FastCommerce-managed address.
This provides several advantages:
Stronger Brand Recognition
Customers immediately recognize who the email is from, helping reinforce your brand identity.
Increased Customer Trust
Emails sent from your own domain appear more professional and credible.
Better Engagement
Recipients are generally more likely to open, read, and interact with emails from recognizable senders.
Improved Deliverability
Authentication signals to email providers that your messages are legitimate, increasing the likelihood of reaching the inbox.
Domain Authentication vs. Email Verification
Many businesses confuse email verification with domain authentication, but they serve different purposes.
Email verification confirms that you own and have access to a specific email address.
Domain authentication verifies ownership of the domain itself and authorizes FastCommerce to send emails on behalf of that domain.
Both are important, but only domain authentication helps improve sender reputation and deliverability.
Getting Started
Authenticating your domain is a one-time setup process that requires adding DNS records to your domain provider.
FastCommerce provides the necessary records and automatically validates them once they have been added.
Most businesses can complete the process in just a few minutes.
Final Thoughts
If email marketing is an important part of your business, domain authentication should be one of the first steps you complete.
Authenticating your domain helps improve deliverability, protects your brand reputation, increases customer trust, and ensures your campaigns are sent from your own branded email address.
By completing domain authentication before sending campaigns, you give your emails the best possible chance of reaching your customers’ inboxes.
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