Set up a custom mailing domain to comply with your DMARC policy

1. Choose a subdomain for sending Sufio emails
2. Set up an SPF record
3. Set up a DKIM key
4. Set up MX records
5. Set up a CNAME record

To set up a custom mailing domain, we strongly recommend that you dedicate a separate subdomain (for example, invoices.acmeshop.com) for sending emails from Sufio. This way, you can protect your domain reputation, especially when sending a large number of emails.

Sender Policy Framework (SPF) is a text record added to the Domain Name System (DNS) that contains the domain names of all the servers you authorized to use your domain name to send emails.

To set up an SPF record:

1. In your domain provider management console, navigate to the DNS record settings for the hostname of the subdomain you specified to send Sufio emails (for example, invoices.acmeshop.com).
2. Check if you already have an existing SPF record for the subdomain you dedicated to send emails from Sufio. Search for a TXT record that starts with v=spf1.
3. If you do not have an SPF record, create a new TXT record for the hostname of your subdomain (for example, invoices.acmeshop.com), and in the value field, enter the following value:

4. If you are not using a separate subdomain and already have an existing SPF record, add the mailgun.org to the value field. For example, if you previously had _spf.google.com in your record, the resulting field should look like this:

5. Save your changes.

Please note that it may take up to 48 hours for the changes to be applied.

DomainKeys Identified Mail (DKIM) is an authentication method used to verify that the emails come from the actual sender and not from someone that pretends to be the sender. When a receiving server checks a Sufio email sent from your domain, it verifies that the email was signed with a DKIM key from Sufio.

To set up DKIM for your custom mailing domain:

1. Contact our support team to create and provide you with a custom DKIM key for your chosen domain.
2. In your domain provider management console, navigate to the DNS record settings (also called Domain settings) and locate the option to create or edit records.
3. For the subdomain you chose for sending Sufio emails, add a new TXT record with the hostname and value provided by our support team.
4. Save your changes.

Mail Exchange (MX) records are used to direct incoming mail for an email address to a specific server address. For Sufio emails, a custom MX record needs to be configured for your subdomain to allow tracking of email deliverability.

That means, when a customer receives an email from Sufio, their server sends back a confirmation that the email was received and the MX record tells the customer to send the confirmation back to Sufio.

If you do not set up the MX record, some receiving servers may even reject emails sent from your domain or mark them as spam.

To set up an MX record:

1. In your domain provider management console, navigate to the DNS record settings (also called Domain settings) and locate the option to create or edit records.
2. For the subdomain you chose for sending Sufio emails, add a new MX record with the hostname of your subdomain (for example, invoices.acmeshop.com) and the following values:

3. Save your changes.

Sufio uses CNAME record to track email opens and clicks.

1. In your domain provider management console, navigate to the DNS record settings (also called Domain settings) and locate the option to create or edit records.
2. For the subdomain you chose for sending Sufio emails, add a new CNAME record with the hostname (the subdomain should start with email., for example, email.invoices.acmeshop.com) and value mailgun.org.
3. Save your changes.

After following all the steps, contact our support team to confirm that everything has been set up correctly and to receive help troubleshooting any issues. They will then add the custom mailing domain and ensure that the entire setup on your Sufio account works as expected.