用exchange协议发送邮件
返回错误401 一般为用户名与密码错误
ExchangeClient exchangeClient = new ExchangeClient.ExchangeClientBuilder()
.hostname("email.****.com.cn") //这里是正确的服务器名字
.exchangeVersion(ExchangeVersion.Exchange2010)
.username("s********u") //此处其实不用写邮箱@尾缀 也不用加域
.password("121****111")
.subject("主题")
.message(str)
.attachments(filePath)
.recipientTo("4****")
// .recipientBcc(reBcc)
.recipientCc(reTcc)
.host("*****.21")
.port(8090)
.build();