Assigning an OX Email mailbox to a domain registered with your provider connects your custom domain to a professional email address, such as [email protected]. Before the mailbox can send and receive messages, the domain, email plan, and required DNS settings must all be correctly linked.
This setup typically involves selecting the registered domain, creating a new mailbox or assigning an available one, and confirming that the domain uses the required mail records. Once the assignment is saved, the service may need a short activation period while the system validates ownership, DNS configuration, and mailbox availability.
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If the mailbox does not activate right away, the most common causes are an ineligible domain, missing OX Email service, incorrect MX records, or pending DNS propagation. Checking each requirement in order helps ensure the email address becomes active and ready to test successfully.
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Before assigning an OX Email mailbox, confirm that the domain is registered in the same customer account where you plan to manage the email service. In most control panels, only domains under your account can be selected directly during mailbox assignment. If the domain was registered elsewhere, transferred recently, or managed under a different login, it may not appear in the domain list until ownership, transfer, or account access is resolved.
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Check that the domain is active and not expired, suspended, pending verification, or locked due to billing or registry requirements. A domain that is expired or suspended cannot reliably receive mail, even if the mailbox itself is created successfully. Also confirm that the domain has passed any required contact verification, such as registrant email validation, because some registries or providers restrict DNS and service changes until the verification is complete.
Basic eligibility checks
- Domain status: The domain should show as active, registered, and in good standing in your account.
- Account ownership: The domain and OX Email product should be available under the same provider account or linked accounts with the correct permissions.
- Email plan availability: You should have an unused OX Email mailbox, seat, or subscription ready to assign.
- DNS management access: You need access to the domain’s DNS zone, either with the provider or wherever the nameservers are hosted.
- No conflicting mail service: Existing mail hosting, forwarding-only services, or third-party MX records may need to be replaced or adjusted.
If you already use email on the domain, review the current mailbox setup before making changes. Assigning OX Email may require updating MX records, which can redirect incoming mail away from the current provider. For a business domain, list any existing addresses, aliases, forwarders, and shared mailboxes so you can recreate or migrate them as needed before switching delivery to OX Email.
Also confirm that the email address you want to create is valid for the selected domain. The local part of the address, such as sales in [email protected], should not contain unsupported characters or exceed mailbox naming limits set by the provider. Common formats like info@, support@, firstname.lastname@, and admin@ are usually accepted, but reserved names or duplicate addresses may be blocked if they already exist as a mailbox, alias, or forwarding rule.
If the domain or OX Email product does not appear as eligible, check for pending invoices, incomplete domain verification, recent transfers, or missing product activation. For recently registered or transferred domains, allow time for account records and DNS services to finish provisioning. Once the domain is active, the email subscription is available, and DNS management is accessible, you can proceed to the email management area and assign the mailbox to the registered domain.
Access the Email Management Area
After confirming that your registered domain and OX Email plan are eligible, sign in to your customer account and open the area where email services are managed. This is usually found from the main dashboard under labels such as Email, OX Email, Mailboxes, Services, or Products. If your account includes mulle services, use the search bar or service filter to locate the OX Email subscription you want to assign.
Before continuing, make sure you are logged in with an account that has permission to manage both the domain and the email product. If the domain is owned by one user profile and the OX Email plan is under another, the assignment option may not appear. In team or organization accounts, you may need administrator access, billing access, or a specific permission such as Manage Email or Manage Domains.
Typical navigation path
- Sign in to your provider account.
- Open the main dashboard or control panel.
- Select Email, OX Email, or Mailboxes from the menu.
- Choose the OX Email plan or mailbox package that is not yet assigned.
- Select an action such as Assign domain, Set up email, Create mailbox, or Manage.
If you see more than one OX Email product, check the plan name, number of mailboxes, renewal date, and status before selecting one. A service marked Pending Setup, Active, or Unassigned is generally the correct place to start. A service marked Expired, Suspended, or Cancelled may need to be renewed or restored before it can be assigned to a domain.
What to check on the email management page
- Service status: Confirm that the OX Email plan is active or ready for setup.
- Available mailboxes: Check whether you have unused mailbox slots available.
- Domain assignment field: Look for a dropdown or selector listing domains registered in your account.
- Setup prompts: Review any messages asking you to complete activation, verify ownership, or update DNS.
- Existing mailbox list: Confirm whether a mailbox already exists for the domain before creating a new one.
If the email management area does not show your domain or does not offer an assignment option, refresh the page and confirm that the domain appears in your domain portfolio. Recently registered, transferred, or renewed domains may take a short time to become available across all account tools. Also check that you are not viewing a different customer profile, reseller account, or organization workspace. Once you can access the OX Email management screen and identify the correct email service, you can proceed to selecting the registered domain for the mailbox assignment.
Select the Registered Domain
After opening the email management area, choose the domain that will use the OX Email service. The domain selector usually lists all domains registered in your account, along with their current email status, renewal state, and available services. Select the exact domain name you want to connect to the mailbox, especially if your account contains similar domains such as example.com, example.net, or regional variations.
Use only a domain that is active, registered under the same provider account, and eligible for OX Email assignment. If the domain is expired, suspended, pending verification, or still completing registration, the email assignment may not continue until the domain status is resolved. Some control panels display a warning beside domains that cannot currently receive email services; open the domain details page if you need to confirm its registration status.
What to check before selecting the domain
- Domain status: The domain should show as active or registered, not expired, suspended, or pending deletion.
- Account ownership: The domain should be managed from the same customer account where the OX Email product is available.
- Nameserver configuration: If the provider’s nameservers are used, DNS setup is usually simpler because required records can often be added automatically.
- Existing email services: Check whether another mail service, such as forwarding, hosted email, or external MX records, is already assigned to the domain.
- Spelling and extension: Confirm the full domain name before continuing, including the correct top-level domain.
If the domain is already using another email platform, assigning OX Email may require replacing existing MX records later in the setup. This can interrupt mail delivery to the previous provider once the DNS change takes effect. If you are migrating from another mailbox provider, make sure you have access to the old mailbox, have backed up messages, and understand when mail routing will switch to OX Email.
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In some panels, selecting the domain opens an assignment screen where you can choose an existing OX Email package or start creating a new mailbox. In others, you may need to click an action such as Assign Email, Add Mailbox, Connect Domain, or Manage Email. If the domain does not appear in the list, refresh the page, check that you are in the correct account or customer profile, and confirm that the domain is not managed through a separate reseller, organization, or billing contact.
| Domain condition | Expected action |
|---|---|
| Active domain registered in the account | Select it and continue to mailbox assignment. |
| Domain expired or suspended | Renew or restore the domain before assigning email. |
| Domain uses external nameservers | Be prepared to add or update DNS records manually. |
| Domain already has MX records | Review the existing mail provider before replacing records. |
Once the correct registered domain is selected, proceed to the mailbox step. The selected domain becomes the part after the @ symbol in the email address, so the mailbox you create or assign will use that domain for sending and receiving mail.
Assign or Create the OX Email Mailbox
After selecting the registered domain, assign an available OX Email plan to a mailbox address on that domain. In the email management area, look for an option such as Create Mailbox, Add Email Account, Assign Mailbox, or Set Up OX Email. The exact label may vary, but the workflow is the same: choose the OX Email product, enter the mailbox name, attach it to the selected domain, and save the setup.
Start by entering the part of the email address that appears before the @ symbol. For example, if the selected domain is example.com and you enter info, the mailbox will be created as [email protected]. Use a clear mailbox name that matches its purpose, such as sales, support, billing, or a staff member’s name. Avoid spaces, special characters that are not supported, and names that may be confused with system addresses unless your control panel allows them.
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If you are setting up a new address, select the OX Email plan you want to use and complete the mailbox details. Most setups require a mailbox name, password, and sometimes a display name or recovery address. Choose a strong password that meets the provider’s requirements, usually a mix of uppercase and lowercase letters, numbers, and symbols. If the interface offers password generation, use it and store the password securely before continuing.
- Mailbox address: Confirm the full address uses the correct registered domain.
- OX Email plan: Make sure the selected plan has an available mailbox slot.
- Password: Set a secure password that meets all complexity rules.
- Display name: Enter the sender name users will see in received messages.
- Storage quota: If available, assign the mailbox storage limit according to the user’s needs.
Assign an existing mailbox or license
If you already purchased an OX Email package but have not linked it to an address, choose the unassigned mailbox or license from the available list. The system may show labels such as Unassigned, Available, or Not configured. Select that item, enter the desired mailbox name, and attach it to the domain. If the mailbox was previously assigned to another domain or address, check whether the provider allows reassignment, as some changes can remove existing mailbox data or require cancellation and recreation.
Before confirming, review the full mailbox address and selected product carefully. A common setup error is assigning the mailbox to the wrong domain when several domains are listed in the account. Another common issue is trying to create an address that already exists as an alias, forwarding address, group, or previous mailbox. If the panel reports that the address is unavailable, search the email accounts, aliases, and forwarding sections for the same name and remove or rename the conflicting entry if appropriate.
Once saved, the mailbox may appear immediately in the email list, or it may show a temporary status such as Pending, Provisioning, Activating, or Awaiting DNS. This means the mailbox record has been created, but the service may still need to finish provisioning or confirm the domain’s mail routing settings. Do not repeatedly recreate the same mailbox while activation is pending. Instead, refresh the email management page after a few minutes and continue to the DNS and MX record checks if the status does not change.
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After the OX Email mailbox is assigned to your registered domain, confirm that the domain’s DNS zone is configured to route mail to the correct OX Email servers. The mailbox can exist in the control panel, but messages will not be delivered until the domain’s MX records point to the required mail platform. If the domain uses the provider’s default nameservers, these records may be added automatically during assignment. If the domain uses external nameservers, you will usually need to copy the required records from the email setup screen and add them where the DNS is hosted.
Start by opening the DNS or zone editor for the domain you selected. Look for existing MX records and compare them with the OX Email requirements shown in your email management area. If another mail service was previously used, such as Google Workspace, Microsoft 365, cPanel mail, or a legacy hosting mailbox, remove or replace the old MX records only when you are ready to switch delivery to OX Email. Keeping conflicting MX records can cause mail to route unpredictably, especially when mulle records share the same priority.
Common DNS checks before activation
- MX records: Confirm that the hostname, target mail server, and priority values match the OX Email setup instructions exactly.
- Nameservers: Make sure you are editing DNS at the active DNS provider. Changes made in the wrong DNS panel will not affect live mail routing.
- TTL values: A lower TTL, such as 300 or 600 seconds, can help changes propagate more quickly, though some networks may still cache older records.
- Duplicate records: Remove outdated MX records that belong to previous mail providers unless your setup instructions specifically require multiple entries.
- Domain status: Confirm the domain is active, not expired, not suspended, and not blocked by a registry hold.
Some OX Email setups may also require supporting DNS records for authentication and deliverability. These can include SPF records to authorize the OX mail servers to send on behalf of your domain, DKIM records for signed outgoing mail, and DMARC records to define how receiving servers should handle unauthenticated messages. These records do not usually control whether incoming mail reaches the mailbox, but they can affect whether outgoing messages are accepted or filtered by recipients. If the control panel provides recommended TXT or CNAME records, add them exactly as displayed, paying close attention to hostnames, quotation marks, and copied spaces.
| Record Type | Purpose | What to Check |
|---|---|---|
| MX | Routes incoming mail to OX Email | Correct mail server target and priority |
| SPF | Authorizes outgoing mail servers | Only one SPF TXT record exists for the domain |
| DKIM | Signs outgoing messages | Selector and TXT or CNAME value match the panel |
| DMARC | Sets policy for authentication failures | Record exists at _dmarc.yourdomain.com |
Once the records are saved, allow time for DNS propagation. Many updates complete within minutes, but it can take several hours depending on previous TTL values and resolver caching. Return to the OX Email management page and use any available validation or refresh option to recheck the domain. If validation fails, compare each record character by character, confirm that the domain’s nameservers are correct, and check whether DNSSEC or registrar-level restrictions are preventing the zone from resolving properly.
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If the email service still does not activate after the DNS appears correct, test the domain with a public DNS lookup tool and verify that the live MX results match the required OX Email records. Then try sending a message from an external address to the new mailbox and check for bounce messages. A bounce response often shows whether the issue is an invalid MX target, inactive mailbox, domain suspension, or delayed propagation. If the records are correct and propagation has completed, contact support with the domain name, mailbox address, screenshots of the DNS records, and any bounce error received.
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After assigning the OX Email mailbox and confirming the required DNS records, allow a short activation period before testing. In many cases, the mailbox becomes available within a few minutes, but DNS changes can take longer depending on propagation, TTL values, and whether the domain previously used another mail provider. Return to the email management area and check the mailbox status. It should show as active, enabled, provisioned, or ready, depending on the wording used in your control panel.
If the mailbox status is still pending, review the activation details shown next to the service. The panel may indicate that DNS validation is incomplete, the mailbox is still being created, or the domain has not yet been linked correctly. Confirm that the domain selected during assignment matches the email address you created, such as [email protected], and that the mailbox is attached to the correct subscription or email plan. If your provider displays a service checklist, make sure each item is marked as complete before proceeding.
Test webmail access and sending
Once the mailbox appears active, sign in through the provider’s OX webmail page using the full email address and mailbox password. A successful login confirms that the account exists and authentication is working. If login fails, reset the mailbox password from the email management area and try again after a few minutes. Avoid using the domain account password or hosting control panel password unless the provider specifically states they are the same.
- Send a test message from the OX mailbox to an external address, such as a personal Gmail or Outlook account.
- Reply from the external account back to the new OX Email address.
- Confirm that the sent message appears in the OX Sent folder.
- Confirm that the reply reaches the OX Inbox without bouncing.
- Check the spam or junk folder on both sides if either message does not appear.
Check common validation issues
If messages do not send or receive correctly, recheck the domain’s MX records first. The active MX records must point to the provider’s OX mail servers, not to a previous hosting service, third-party mail provider, or parking service. Also check for duplicate or conflicting MX records, especially if the domain was previously connected to another email platform. Where SPF, DKIM, or DMARC records are required or recommended, verify that they were added exactly as provided, with no extra spaces, missing quotation marks, or incorrect hostnames.
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| Issue | What to check |
|---|---|
| Mailbox shows pending | Confirm the domain assignment, mailbox plan, and DNS validation status in the control panel. |
| Cannot log in | Reset the mailbox password and sign in with the full email address. |
| Cannot receive mail | Check MX records and remove old mail routing entries from previous providers. |
| Messages go to spam | Review SPF, DKIM, and DMARC records if your provider supplies them. |
If the service still does not activate after DNS has propagated, contact support with the domain name, mailbox address, screenshots of the current DNS records, and any error messages shown in the email management area. This helps the provider confirm whether the issue is DNS-related, subscription-related, or caused by incomplete mailbox provisioning.
Frequently Asked Questions
Can I assign OX Email to any domain in my account?
You can assign OX Email only to a domain that is eligible for the service and managed in your account. If the domain is registered with the provider, it should appear in the email or domain management area as an available option. If it does not appear, check that the domain is active, not expired, and not already assigned to another incompatible email service.
Do I need to change DNS records when the domain is registered with the provider?
In many cases, the required DNS records are added automatically when the domain uses the provider’s default nameservers. If the domain uses custom nameservers or external DNS hosting, you may need to add the required MX records manually. The email service will not receive mail correctly until the correct MX records are published and propagated.
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Can I create a new mailbox during the assignment process?
Yes, most email management panels let you either assign an existing OX Email mailbox or create a new mailbox while setting up the domain. You will usually need to choose the email address, set a mailbox password, and confirm the mailbox plan or storage option. Make sure the mailbox name matches the address you want users to receive mail at, such as [email protected].
How long does it take for OX Email to start working after assignment?
The mailbox may become active within a few minutes if the domain uses the provider’s default DNS settings. If DNS records were changed manually, activation can take longer because MX record propagation may take several hours. You can test by logging in to webmail and sending a message to and from the new mailbox.
What should I do if the mailbox is assigned but email is not working?
First, confirm that the mailbox shows as active in the email management area and that the domain is assigned to the correct OX Email service. Then check the domain’s MX records to make sure they point to the required mail servers and that no conflicting MX records remain. If everything appears correct but mail still fails, wait for DNS propagation and contact support with the domain name, mailbox address, and any bounce-back error messages.
Bottom Line
Assigning OX Email to a domain registered with us usually comes down to selecting the correct domain, creating or choosing the mailbox you want to use, and confirming that the required DNS or activation checks pass successfully. Once those steps are complete, the mailbox should be ready to send and receive mail using your domain.
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