White labeling lets you deliver our email solution under your own brand, your own webmail URL (for example mail.yourdomain.com instead of mail.op-email.eu) and your own logo in the webmail interface.

Before you start

• You need an active email product in your Openprovider account.
• You need access to the DNS zone of the domain you want to use for the webmail hostname.
• Setup is partly manual on our side: the SSL certificate for your custom hostname is issued by our team after you complete the steps below.

Step 1 - Choose your webmail hostname

• Decide the subdomain that will replace mail.op-email.eu.
• Examples: webmail.mycompany.tld, mail.yourdomain.com.
• Use one hostname per white-label setup, and keep it consistent across every step below, the value you enter in the control panel must match your DNS record exactly.

Step 2 - Add the CNAME record (required)

• In the DNS zone of your chosen domain, add a CNAME record for the hostname pointing to mail.op-email.eu:

mail.domain.tld IN CNAME mail.op-email.eu

• Replace mail.domain.tld with your own hostname.
• If the domain uses Openprovider nameservers, the record can be added directly from your Openprovider DNS zone.
• Wait 2-4 hours after adding the record. This allows DNS propagation and is required before the next steps can succeed.
• You can confirm the record is live with a DNS lookup (for example dig mail.domain.tld CNAME or any online DNS checker).

Step 3 - Configure white labeling in the control panel

• Log in to your Openprovider control panel.
• Go to Email Accounts → Integrations & Tools → White Labeling and click Activate.
• Enter your chosen hostname (for example mail.yourdomain.com), it must match the CNAME record from Step 2 exactly.
• Upload your logo(s).
• Save the settings.

link: https://cp.openprovider.eu/dashboard/account/email-white-label/setting

Step 4 - Notify us to complete the setup

• Once the CNAME record is live and the hostname and logo are saved, contact our support team so we can issue the SSL certificate for your custom hostname.
• SSL issuance is not automated. Allow 12-24 hours from the moment it is initiated.
• SSL will not be generated if the CNAME record is not yet resolving.

Step 5 - Start using your branded hostname

Once the certificate is active, your hostname (for example mail.yourdomain.com) can be used for:

• Webmail access
• SMTP
• IMAP
• POP

The same SSL certificate covers all of these services.