{
    "Enable": false,
    "To": ["na@nb.com"],
    "#HttpAPI": "如有此字段，则按 http api 方式发送",
    "#Keepalive": "如果此时间段内没有邮件发送，则关闭 SMTP 连接，单位/秒",
    "Keepalive": 30,
    "#doc": "https://godoc.org/github.com/go-gomail/gomail#Dialer",
    "Host": "smtp.exmail.qq.com",
    "Port": 25,
    "Username": "sendmail@nb.com",
    "Password": "nbhh",
    "SSL": false,
    "LocalName": "sendmail@nb.com"
}