DNS Record Settings at Gigaserver

Michal Krejčí

5. September 2025

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In this guide we’ll walk you through setting up domain records DKIM, SPF, DMARC, and CNAME (domain router) with the domain provider Gigaserver. These records are required to securely send bulk emails from the Boldem app and prevent them from ending up in spam.

1. Log in to your account in the Boldem app.
2. In the left menu, select Settings and click Domains.

3. If you didn’t enter a sending domain when creating your account, click the + Add sending domain button. If you already added the domain when creating your account and see it in the list, proceed to step 4 below.

4. Enter the sending domain name and click Create. Enter the domain without www, e.g. example.cz.
   

5. Click the Details button for the domain in the list.
   

6. Click the Domain Settings tab.

7. The page will display the DKIM signing details, the SPF record, and the CNAME record. Keep this window open—you’ll need it in a moment.
8. In the new window, sign in to your Gigaserver account to manage your domain.
9. From the top drop-down menu, select your domain and click Select.
10. Click DNSThe Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resource... in the left menu. A list of domain records will appear.

DKIM Record Settings

1. In the Gigaserver interface, select TXT from the Type drop-down menu.

2. In your Boldem account, in the DKIM signature section, copy the required record from the Name custom field by clicking the copy icon.
   

3. In the Gigaserver interface, paste the copied value into the Record name field.
4. In your Boldem account, in the DKIM signature section, copy the required record from the Value custom field by clicking the copy icon.

6. In the Gigaserver interface, paste the copied value into the Record Data field.
7. Save the record by clicking the button with the plus icon. A confirmation dialog will appear.
8. Click OK.

SPF Record Settings

Edit existing SPF record

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

1. Click the Record Data field in the row with the existing SPF data and find the ~all tag.
2. Insert the string include:spf.boldem.cz before the tag ~all.
3. Save the record by clicking the edit icon.

Add 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. In the Gigaserver interface, select TXT from the Type drop-down menu.
2. Leave the Record name field blank.
3. In your Boldem account, in the SPF record section, copy the required record from the Value custom field by clicking the copy icon.

4. In the Gigaserver interface, paste the copied value into the custom field Data záznamu.

5. Save the record by clicking the button with the plus icon. A confirmation dialog will appear.
6. Click OK.

DMARC Record Settings

Edit existing DMARC record

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

v=DMARC1; p=none; rua=mailto:dmarc@example.com

1. Click in the Record Data field in the row with existing DMARC data.
2. A dialog to edit the details will appear. In the Record data field, paste the value you copied from your Boldem account in the Value section. Only copy the portion of the string that begins with mailto. Example of a DMARC value in Boldem:

3. In this case, copy only the mailto:pdgpt8b8@dmarc.boldem.cz part.
4. At the end of the section 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:

v=DMARC1; p=none; rua=mailto:dmarc@example.com,mailto:pdgpt8b8@dmarc.boldem.cz

5. Save the record by clicking the edit icon.

Add a 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. In the Gigaserver interface, select TXT from the Type drop-down menu.
2. In the Record name field, enter the value you copied from your Boldem account’s DMARC record in the Name custom field by clicking the copy icon.

3. Paste into the Record data field the code you copied from your Boldem account’s DMARC record section in the Value custom field by clicking the copy icon.

4. Save the record by clicking the button with the plus icon. A confirmation dialog will appear.
5. Click OK.

CNAME record settings (domain router)

1. In the Gigaserver interface, choose CNAME from the Type drop-down menu.
2. In your Boldem account, under CNAME (domain router), copy the required record from the Name custom field by clicking the copy icon.

3. In the Gigaserver interface, paste the copied value into the Record name field.
4. In your Boldem account, in the CNAME (domain router) section, copy the required record in the Value custom field by clicking the copy icon.

5. In the Gigaserver interface, paste the copied value into the record’s Data field.
6. Save the record by clicking the button with the plus icon. A confirmation dialog will appear.
7. Click OK.

Domain Record Validation

After you set up the records, it can 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, go to Settings/Domains in the Boldem app, select your domain, and on the Domain Settings tab click the Check settings button.

The ideal result of the check should be green-highlighted information for each record:

If domain changes don’t take 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

When validating the CNAME record, you may encounter the following error:

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

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

When using Boldem, we use a Let’s Encrypt certificate, so add a new record to your domain with this identifier. Leave existing CAA records unchanged.

Example of adding a record with provider Wedos (Vedos):

1. After logging in to the domain administration, click the domain you want to edit.
2. Select the Edit DNS records. An overview of the domain’s records will appear.
3. Check whether a CAA record containing the keyword “letsencrypt.org” exists among the records, and if not, add one by clicking new record.
4. Leave the Name field blank and keep TTL at its default. In the Type field, select CAA.
5. Enter the following in the Data field:
   0 issue “letsencrypt.org”

6. Click Save record.

The resulting CAA record:

Confirm 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.