The Mail tab at Domains > example.com is missing for some subscriptions in Plesk
In an attempt to create a new subscription, the following error is shown:
Error: mailmng failed: AddDomainEx(example.com) failed: Error code -6. Error message: Failed to create 'example.com'. The maximum number of domains allowed has been reached.
When creating a mailbox, the following error appears in Plesk:
Error: Unable to update the mail account properties:mailmng failed: AddUser2([email protected]) failed: Error code -5. Error message: Failed to add the user '[email protected]'. The maximum number of users for the server has been reached..
In SmarterMail web interface SmarterMail > Settings > Activation > Licensing the limit is reached:
SmarterMail license limits have been reached, no license is installed or license is inactive.
Upgrade SmarterMail license to allow more mailboxes/domains to be created.