一个开源项目代码,用来C#发邮件,sendmail可以填代理服务器 Smtp smtpClient = new Smtp(); smtpClient.Host = "smtp.163.com"; smtpClient.Port = 25; smtpClient.Password = "******"; smtpClient.Username = "你的邮箱地址@之前的那段字符串"; OpenSmtp.Mail.MailMessag