Symptoms
- Unable to change mailbox size in Plesk GUI going to Domains > example.com > Email Addresses > Click on the mailbox > Another size. The following error is shown in Plesk GUI:
The specified limit is invalid.
Cause
The custom mailbox size trying to be set on the mailbox is limited by the Subscription, Service Plan and/or Reseller's Service Plan settings:
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In Subscriptions: Subscriptions > example.com > Customize > Mailbox size
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In Service Plan: Service plans > Service_plan_name > Mailbox size
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In Resellers: Resellers > John Doe > Customize > Mailbox size
Resolution
Note: If Plesk Web Admin edition is installed, apply the solution described here
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Change the default mailbox size limit for Subscription or for Service Plan or for Reseller. This depends on where the limit is configured in each specific case. There are 3 options:
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Change limit in a Subscription:
Go to Subscriptions > example.com > Click on Customize option available in the Account right sidebar section > Change Mailbox size > Click on Update & Lock to apply the changes
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Change limit in a Service Plan:
Go to Service Plans > Choose required Service Plan > Change Mailbox size > Click OK to apply the changes
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Change limit in a Reseller:
Go to Resellers > Click on the name of the Reseller > Click on Customize option available in the Resources right sidebar section > Change Mailbox size > Click on Update & Lock to apply the changes
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Additional information
Unable to change maibox size: The specified limit is invalid