If you're experiencing an issue where the mailbox size limit in SmarterMail is not updating after changing it in Plesk, there are a few steps you can take to troubleshoot and resolve the problem:

1. Verify Configuration:

   • Double-check that you've made the correct changes in Plesk. Make sure you've set the desired mailbox size limit for the specific email account.

2. Wait for Synchronization:

   • Sometimes, changes in Plesk may take a little time to synchronize with SmarterMail. It's possible that the update just hasn't taken effect yet.

3. Manually Synchronize Accounts:

   • In some cases, you may need to manually synchronize the accounts between Plesk and SmarterMail. This can usually be done within the SmarterMail interface or through the SmarterMail API.

4. Check for Errors or Logs:

   • Review the logs in both Plesk and SmarterMail for any error messages or warnings related to mailbox size limits. This can provide more specific information about what might be causing the issue.

5. Restart Services:

   • Restart both the Plesk and SmarterMail services. This can sometimes help apply changes that may not have taken effect immediately.

6. Clear Cache (if applicable):

   • If there's a caching mechanism in place, clear the cache to ensure that the updated mailbox size limit is being recognized.

7. Verify Integration and Compatibility:

   • Ensure that the versions of Plesk and SmarterMail you're using are compatible and that the integration between them is properly configured.

8. Contact Support:

   • If none of the above steps resolve the issue, it may be necessary to reach out to the support teams for both Plesk and SmarterMail. They may be able to provide specific guidance or solutions.

9. Consider Manual Adjustment in SmarterMail:

   • As a last resort, you might have to manually adjust the mailbox size limit within SmarterMail if the integration with Plesk continues to present issues.

Remember to always back up any critical data before making changes, and proceed with caution, especially when modifying settings related to email accounts.