How to create a mailbox in Plesk

Open the correct hosting service

Log in to the assigned Plesk server

1. Sign in to the UKC Client Area.
2. Open Services > My Services.
3. Select the active hosting service containing the domain.
4. Choose Log in to Plesk once and wait for the panel to open.
5. Confirm the expected domain is listed before creating the address.

Create the address

Add a mailbox in Plesk

1. Open Mail in Plesk.
2. Select Create Email Address.
3. Enter the part before @ and select the correct domain from the list.
4. Leave Mailbox enabled when messages should be stored on the server.
5. Generate or enter a strong, unique password.
6. Choose an appropriate mailbox size within the hosting plan’s available capacity.
7. Add an optional description that helps identify the mailbox owner, then select OK.

Make delivery work

Check the domain’s mail route

Creating a mailbox does not change public DNS. The domain’s MX record must direct mail to the UKC hosting service and the selected domain must have mail service enabled in Plesk.

UKC nameservers

Review DNS Manager and confirm the MX and mail host records match the assigned hosting server.

External nameservers

Update MX records at the external DNS provider; changes made only in Plesk will not control public delivery.

Microsoft 365 or Google Workspace

Do not point MX to Plesk unless you intend to replace that provider’s incoming-mail route.

Existing mail on another server

Plan mailbox migration and DNS timing before changing MX records.

Test the new mailbox

Use webmail before configuring a device

1. Open the webmail address supplied for the domain or server.
2. Sign in with the complete email address and the new mailbox password.
3. Send a message to an external address and reply back to the new mailbox.
4. Confirm both messages arrive before adding Outlook, Apple Mail or a phone.

Troubleshooting

If the mailbox does not work

Address already exists

Check Mail for an existing mailbox, forwarder or alias with the same name.

Cannot create mailbox

Check the hosting plan’s mailbox count and disk capacity.

Webmail login fails

Reset the mailbox password in Plesk and use the full email address as the username.

Sending works, receiving fails

Check public MX records and ensure Plesk mail service is enabled for the domain.

Receiving works, sending fails

Use authenticated SMTP on the assigned UKC server hostname.

Certificate warning

Use the assigned UKC server hostname, such as ukc12.uk, rather than a hostname without a matching certificate.