What is the sender domain authentication in Mailercloud?

Learn how to filter out spam and fraud to increase the sender reputation and email deliverability by verifying with Domain authentication.

What is domain authentication?

Domain authentication is the method of verifying that an email is actually sent from a sender who they are claiming to be. It has an immensely positive impact on the reputation of the sender and email deliverability by filtering out spam and fraud. Internet service providers (ISP) cannot trust messages that don’t have the authentication set up, as they cannot be certain about the source of the message. The most common email authentication standards are SPF, DKIM, and DMARC.

How to set up domain authentication in Mailercloud?

To authenticate your domain, you need to add the DNS records provided by Mailercloud to your domain providers such as Godaddy, Cloudflare, etc.

Step1: Add domain to your mailercloud account

To add a domain to your Mailercloud account, Please complete the following steps

  • Go to Account Settings.

  • Click on Settings.

  • In the drop-down menu click on Domains.

  • Click on the Add domain button to add a domain.

  • On the pop-up screen that follows, add your domain and domain provider and Proceed.

  • Your domain has been added successfully.

Step 2: Add DNS records to your domain provider

You will now have to add the DNS records to your domain provider. These records will be the CNAME and TXT records that you get after adding the domain. You will need to copy those values and paste them into the domain provider.

How to add a DNS record with a provider?

Following is a list of help docs that will help you to complete this process


If a user adds DMARC to their domain provider, they just need to update the TXT record in their provider. If not, they need to add the DMARC record as CNAME.

Also, the users who have already published TXT records for SPF, must delete the previous record and add the new record.

  • Add only one SPF record of a domain in the domain provider. If more than one is added, it will affect email sending.

  • Add a valid SPF TXT record to your domain provider.

  • For more than one SPF record, please combine the record and update it in the domain provider.

Step 3: Authenticate Your Domain

Once you updated the DNS records to your domain providers, Please click on the Authenticate button to complete the process.

Other use cases

Depending on whether the domain has a mailbox or not, there are three scenarios for adding a domain.

Case-1: If the domain has a mailbox, you can simply add the domain by following the detailed steps mentioned above.

Case 2: If it does not have a mailbox, you will need to add a subdomain first and then proceed with the rest of the procedure to add the domain.

Case 3: If there is no mailbox and you want to send using domains, you will need to add the following records.

Host @

Type: MX

Points to: mail.mlrcld.com.

Priority 10:

How to add a sender ID?

To add a sender ID on Mailercloud-

  • Go to Account Settings.

  • Click on Settings.

  • In the drop-down menu click on Sender management.

  • Click on Add sender.

  • Fill in the details in the pop-up form that slides open on the right-hand side of your page. These details include the email address, the reply email address, company name and address, etc.

  • Click on Continue.

  • You will be sent a verification email.

  • Click on the link in the verification email to confirm and complete the process of adding a new sender email ID.

Mailercloud restricts domains from all major ISPs and those that have a strict DMARC policy, as they affect email campaign deliverability. Also, disposable email domains are restricted.