DNS Records Settings in cPanel

Michal Michal Krejčí
5. September 2025

In this guide we’ll walk you through setting up domain records DKIM, SPF, DMARC, and CNAME (domain router) in the cPanel control panel. These records must be configured if you want to safely send bulk emails from the Boldem app and prevent your messages from ending up in spam.

  1. Log in to your Boldem account.
  2. In the left menu, select Settings and click Domains.
Settings/Domains menu
  1. If you didn’t enter a sending domain name when creating your account, click the + Add sending domain button. If you already entered the domain when creating your account and see it in the list, proceed to step 4 below.
Add sending domain
  1. Enter the sending domain and confirm with the Create button. Enter the domain without www, e.g. example.cz.
Add a new sending domain
  1. Click the Details button for the domain in the list.
Domain details button
  1. Click the Domain Settings tab.
Domain settings for dispatch

The page will display the DKIM signature, SPF record, and CNAME record. Keep this window open; you’ll need it in a moment.

  1. In the new window, log in to your account to manage your domain in the cPanel control panel, which usually runs on port 2083, for example at https://example.com:2083/. You can get the exact URL from your web host or domain provider.
  2. Find and click Zone editor.
cPanel Zone Editor
  1. Click Manage for the domain whose DNS records you want to change.
cPanel Zone Editor — Select Domain

DKIM Record Settings

  1. Click Add record (Add record).
Add cPanel record
  1. A field to fill out will appear.
  2. Do pole Name zadejte údaj, který jste zkopírovali z účtu Boldem v části Name kliknutím na ikonu kopírování.
Boldem.cz DKIM name
  1. Do not change the TTL value.
  2. In the Type field, select TXT.
  3. In the Record (Record) field, paste the code you copied from your Boldem account’s DKIM signature section in the Value custom field by clicking the copy icon.
DKIM signature for Boldem.cz
  1. Save the record by clicking the Save Record button (Save Record).

SPF record settings

Important notices:

  • Each domain or subdomain can have only one SPF record.
  • If your domain already has an SPF record, do not create a new one; add the value from the Boldem app to the existing SPF record.
  • When checking TXT records containing SPF data, be careful you are editing the correct domain! SPF data can differ for the base domain (e.g., example.com) and for a subdomain (e.g., subdomena.example.com). In your Boldem account you will most likely use the base domain (example.com).
  • An SPF record can contain data for up to 10 domains.

Edit existing SPF record

If you find a TXT record in the list of domain records that contains SPF information for your domain (e.g., example.com), you should edit that record instead of creating a new one. Example of an existing record:

existing SPF record in cPanel

If you find a question mark (?all) at the end of an existing SPF record, it means the SPF record is inactive! In that case, when editing (see the procedure below) replace the question mark with a hyphen, i.e. -all. Before updating the record, contact your domain administrator (registrar) to discuss why the question mark was used in the settings.

  1. Click the Edit (Edit) button on the right side of the row and in the Record (Record) field insert the string include:spf.boldem.cz before the tag ~all or -all, or, if present, replace the tag ?all with -all. The resulting form of the example above would be:
Save SPF record
  1. Click the Save Record button to save the record.

Adding a new SPF record

If you don’t find a TXT record in the list of domain records that contains SPF information for your domain, follow these steps:

  1. Click Add record (Add record).
Add cPanel record
  1. A field to fill out will appear.
  2. In the Type field, select TXT.
  3. In the Name field, paste the value you copied from the SPF record section of your Boldem account by clicking the copy icon in the Name custom field.
SPF record in Boldem.cz
  1. Do not change the TTL value.
  2. Paste the code into the Value field that you copied from your Boldem account’s SPF record section in the Value custom field by clicking the copy icon.
SPF record on Boldem.cz
  1. Save the record by clicking the Save Record button (Save Record).

DMARC Record Settings

  • Each domain or subdomain can have only one DMARC record.
  • If your domain already has a DMARC record, do not create a new one and incorporate the information from Boldem into the existing DMARC record.
  • When checking TXT records containing DMARC data, be careful you’re editing the records for the correct domain! DMARC settings can differ between the base domain (e.g., example.com) and a subdomain (e.g., subdomena.example.com). In your Boldem account you will most likely use the base domain (example.com).

Edit existing DMARC record

If you find a TXT record in the list of domain records that contains DMARC information for your domain (e.g., example.com), you should edit that record rather than create a new one. Example of an existing record:

Example of an existing DMARC record
  1. Click the Edit button on the right of the row and add to the Record field the value you copied from your Boldem account under Value. Only copy the portion of the string that begins with mailto. Example DMARC value in Boldem:
Example of a DMARC value in Boldem
  1. In this case, copy only the mailto:pdgpt8b8@dmarc.boldem.cz portion.
  2. At the end of the part of your existing record that starts with rua, add a comma and paste the copied portion of the record. The resulting form of the example above would be:
  1. To save the record, click the Save record button.

Add New DMARC Record

If you don’t find a TXT record in the list of domain records that contains DMARC information for your domain, follow these steps:

  1. Click Add record (Add record).
Add cPanel record
  1. A field to fill out will appear.
  2. In the Type field, select TXT.
  3. In the Name field, enter the value you copied from your Boldem account’s DMARC record in the Name custom field by clicking the copy icon.
DMARC record
  1. Do not change the TTL value.
  2. In the Record field, paste the code you copied from your Boldem account in the DMARC record section under the Value custom field by clicking the copy icon.
DMARC record in Boldem
  1. Save the record by clicking the Save Record button (Save Record).

CNAME Record Settings (domain router)

  1. Click Add record (Add record).
New cPanel Zone Editor Record
  1. A field to fill out will appear.
  2. In the Type field, select CNAME.
  3. In the Name field, enter the value you copied from your Boldem account in the CNAME section in the Name custom field by clicking the copy icon.
CNAME in Boldem.cz
  1. Do not change the TTL value.
  2. Paste the string you copied from your Boldem account’s CNAME section (under the Value column) into the Record (Record) field by clicking the copy icon.
Boldem Domain Router
  1. Save the record by clicking the Save Record button (Save Record).

Domain record validation

After setting up the records, it may take some time for the information to propagate to DNS servers. For most providers, this should happen within an hour, and usually no later than 24 hours.

After setting up all records, open the Boldem app and go to Settings/Domains, select your domain, and on the Domain settings tab click the Check settings button.


The ideal outcome of the check is green‑marked information for each record:

Sending domain check on Boldem.cz

If the domain changes haven’t taken effect after 24 hours, contact your domain provider’s support to verify that the records were entered correctly, then repeat the domain verification process in the Boldem app.

Missing certificate for HTTPS

You may encounter the following error when validating the CNAME record:

The CNAME record is set up correctly. To enable full functionality, you still need to configure a certificate for HTTPS.

CNAME HTTPS certificate settings

This error occurs when the domain contains a CAA (Certification Authority Authorization) record. A CAA record lets domain owners or administrators specify which certificate authorities are allowed to issue SSL certificates for the domain.

Boldem uses a Let’s Encrypt certificate, so you need to add a new record with this identifier to your domain. Leave existing CAA records unchanged.

Example of adding a record for the Wedos (Vedos) provider:

  1. After logging in to the domain administration, click the domain you want to edit.
  2. Select Edit DNS records. An overview of the domain’s records will appear.
  3. Check whether a CAA record containing “letsencrypt.org” exists, and if not, add one by clicking New record.
  4. Leave the Name field empty and the TTL at its default. In the Type field, select CAA.
  5. In the Data field, enter:
    0 issue “letsencrypt.org”
Let's Encrypt — Add record
  1. Click Save record.

This will result in the following CAA record:

Let's Encrypt CAA record

Confirm your entry by clicking the Apply changes button.

Wait 60 minutes and try verifying the domain records in the Boldem app again. If the error persists after another 24 hours, contact customer support.