Ensure your emails are sent using your own domain to improve deliverability rates.

When the sender’s domain is configured and validated in your Closum account, emails will be sent using your domain’s authority.

Setting up your own domain allows for independent reputation management, thereby enhancing deliverability.

SPF Configuration

What is an SPF Record?

SPF stands for “Sender Policy Framework”. An SPF record is used to identify the email servers authorized to send emails on behalf of a specific domain and to prevent other servers from fraudulent or spam emails from that domain.

Although many DNS editors allow editing SPF records, it is recommended that SPF records be entered as a TXT record.

How to create an SPF Record?

If you’re creating an SPF Record, you’ll likely encounter a form with at least the following two fields:

Host ou Name:
Enter @ (The @ symbol in the host or name field means the record is pointed to your own domain. Some DNS editors require the @ symbol, other require the domain itself, and some don’t allow any input. Each DNS editor is different, and you may need to contact your hosting provider for information on how to correctly enter this record).

Value:
Enter v=spf1 a mx include:s1-mail.closum.com ~all

DKIM Configuration

What is a DKIM Record?

DKIM stands for “Domain Keys Identified Mail” and allows receiving servers to confirm that the sender is authorized to send emails on behalf of the domain administrators.

How to create a DKIM Record?

If you’re creating a DKIM record, you’ll likely encounter a form with at least the following two fields:

Host ou Name:
Enter api._domainkey

Value:
Enter the provided public key string.

Note: DNS Configurations can have any number of necessary DKIM records.

In some DNS editors, the Host/Name field may require you to enter the full domain value, such as api._domainkey[__.your-domain.com__](http://.your-domain.com) .

Tracking Configuration

What is a Tracking Record?

The Tracking record enables click tracking in the emails sent. This configuration is important for measuring your campaign’s performance.

How to create a Tracking Record?

Create a CNAME record and configure the following fields:

Host or Name:
Enter __tracking.your-domain.com__

Value:
Enter __mail.eclosum.com__

DMARC Configuration

For DMARC configurations, choose one of the following options and create a TXT record:

Option 1 (simpler):
Host/Name: _dmarc
Value: v=DMARC1; p=none;

Option 2:
Host/Name: _dmarc
Value: v=DMARC1; p=quarantine; rua=mailto:email@closum.com; ruf=[__mailto:email@closum.com__](mailto:email@closum.com)

Option 3:
Host/Name: _dmarc
Value: v=DMARC1; p=reject; rua=mailto:email@closum.com; ruf=mailto:email@closum.com

MX Configuration (optional)

For most users, it won’t be necessary to add or change any MX records in the domain’s DNS.

To optimize delivery, emails should only be sent from domains that have a configured and valid MX (mail server).

Some domains reject emails that don’t have a valid MX record configuration. If this is your case, request your provider to configure the MX for email reception.

Once this configuration is complete, you should wait a few hours for the records to take effect.

If you have any questions during the process, you can contact our team via email or through the live chat available on Closum.

Updated on: 05/06/2025