Component 1

{ "rules_chk_email_add_4_manually_created_inq_by_sales_exist_yes" : {
    "LABEL" : "Check if Email Address for Manually Created Inquiry by Sales Already Has An Account if YES Alert Sales",
    "PLUGIN" : "rule",
    "REQUIRES" : [ "rules", "commerce" ],
    "IF" : [
      { "entity_exists" : {
          "type" : "user",
          "property" : "mail",
          "value" : "[data:clients_email-value-raw]"
        }
      }
    ],
    "DO" : [
      { "drupal_message" : {
          "message" : "This email address already has an account! Please alert a sales manager.",
          "type" : "warning"
        }
      }
    ]
  }
}