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Question How is the Reseller Service Plan "Mailbox size" resource limit supposed to work?

websavers

Regular Pleskian
We've got a server with a Reseller Service Plan configured. Under the Resources tab is the section "Define the resources provided with the plan." which is very similar (the same?) as it is for regular (non-reseller Service Plans) and within that section is the option "Mailbox size" which is set to 5GB.

Additionally, in the section above, the option "Overuse of disk space and traffic is allowed" is enabled (though we've always assumed this meant for any resellers associated with this plan as a whole; not indidividual limits within the plan, like the mailbox size as it behaves that way for regular service plans).

A reseller is synced to the above noted Reseller Plan.

The reseller then has:
1. Their own Unlimited Service Plan configured with the mailbox size set to Unlimited.
2. A customized Subscription (not synced to the Unlimited service plan) where they've configured the mailbox size to be 50GB

My question: shouldn't the master/parent Reseller Plan's configuration of 5GB mailbox size ensure that the max that the reseller can configure in their own service plans and customized subscriptions be 5GB as well?

If not, then what's the purpose of the Mailbox size restriction setting at the Reseller Plan level? What does it do?

Note: this does not appear to be in the docs here: Setting Up Reseller Plans

Nor here:
- Appendix B: Properties of Reseller Plans and Subscriptions
- Resources

In fact in that second link, it specifically states "Note: The overuse policy does not apply to the limits set on size of mailboxes. Therefore, even if you enable overuse, be sure to allocate enough disk space to mailboxes."

I'm quite confident that this Note is accurate for Service Plans, but that it is not accurate for the "Mailbox size" configuration under Reseller Plans, in that it does indeed allow resellers to configure mailbox sizes greater than the limit specified.
 
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