Email Domain Authentication has a huge positive impact on your reputation as a sender and your email deliverability. It tells email providers that you are a real business and Zenler has your permission to send emails on your behalf. You are also explicitly showing your recipients that this email comes from you, so they are less likely to mark your mail as spam.

Go to Site > Integrations and click on the button 'Email Domain Authentication' shown under Zenler Mail section.

If you are already added a Custom Domain, you can find the option to authenticate your email domain under Site > Site Settings > Custom Domain section also.

Clicking on the button, the Email Domain Authentication window will show up.

Click on the button 'Authenticate Your Domain'. A window Authenticate Your Domain will be shown.

Your Domain: Enter your email domain to authenticate here. While entering the domain name, you need NOT add www, http, https etc.

Use automated security: When this option is set as On, it generates 3 different CNAME records.
If this option is set as Off, it generates 1 MX record and 2 TXT records.
In a later step of setting up domain authentication, you can give these records to your DNS provider.
​If your DNS provider does not accept underscores in CNAME records, you will have to turn this option OFF to use MX and TXT records.

When you click the Proceed button, the Verify Your Domain window will be shown up. You can see the records on the window. You can copy these records by clicking on the 'copy' icon near each record and add the same to your host's DNS section.

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NOTE: In some DNS providers, you don't need to add your domain name under Host value.

GoDaddy, Amazon Route 53, and Namecheap, are among providers that automatically add your domain to your new DNS record values, resulting in a CNAME entry with too much information that fails authentication. An example of this would be em5787.your_domain.com.your_domain.com.

Be sure to check your CNAME for this behavior if your domain doesn't validate initially.

Below is an example of the CNAME values under the HOST column as they are displayed and how you will need to enter them into your DNS management with one of these providers:

Entries made in the VALUE or POINTS TO field do not need to be changed.

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If you are not using automated security, the MX and TXT records will be shown on the Verify Your Domain window. You can copy and use the same in your host's DNS section.

After adding, set the option "I've added these records" ON and press the Verify button.

Note: Please wait and check back later as sometimes it may take several hours for us to be able to validate.

After the verification is done, you can see the details of the authenticated email domain under Site > Integrations > Zenler Mail.

The Remove button will remove the email domain authentication you have set up and revert back to default Zenler Mail sender authentication.

Once you've completed the setup steps mentioned earlier, it's necessary to configure a DMARC record with your DNS Provider.

Unless you have an existing DMARC record, the following will need to be added to your DNS on your email domain provider:
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Type:TXT

Name:_dmarc

Content (or Value): "v=DMARC1; p=none; rua=mailto:youremail@yourdomain.com; pct=100; rf=afrf"
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​Note: Ensure that you incorporate all special characters, such as quotations, apostrophes, and spaces. It is advisable to copy and paste the precise value into the designated Value field.

TTL: You can keep the default value
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Eg: ​

​Note: mailto:youremail@yourdomain.com replace with your preferred email address to receive DMARC reports.
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For more details, please refer: https://support.newzenler.com/en/articles/8849860-new-sender-requirements-for-gmail-and-yahoo