1. A system, comprising: an apparatus comprising at least one processor and at least one memory storing program code instructions, the at least one memory and program code instructions being configured to, with the at least one processor, cause the apparatus to at least: identify, via at least one processor, at least one resource rule associated with a particular client device, wherein least one email resource is accessible to the particular client device, wherein the at least one resource rule is identified based at least in part on a device state associated with the particular client device, and wherein the particular client device may only be authorized to access the at least one email resource in an instance in which at least a threshold of the at least one resource rule is satisfied; determine whether at least one of the identified at least one resource rule comprises a resource rule specifying that the particular client device may only be authorized to access the at least one email resource in an instance in which the at least one email resource comprises at least one particular uniform resource locator (URL); and in an instance in which it is determined that at least one of the identified at least one resource rule comprises the resource rule specifying that the at least one particular client device may only be authorized to access the at least one email resource in an instance in which the at least one email resource comprises the at least one particular URL: determine whether the at least one email resource comprises the at least one particular URL; and, in an instance in which it is determined that the at least one email resource does not comprise the at least one particular URL, add the at least one particular URL to the at least one email resource.