请求示例:?tool=mail_cfg&cfg_name=test_cfg&name=测试配置&api_key=test_api_key&protocol=smtp&smtp_server=smtp.ym.163.com&smtp_account=noreply@onebound.cn&smtp_password=noreply&smtp_port=25&smtp_auth=1&smtp_ssl=0&from_user=noreply@onebound.cn&from_name=Steven&reply_to=lxq73061@qq.com
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