使用SMTP协议发送邮件

class Program
    {
        static void Main(string[] args)
        {
            if (args != null && args.Length > 11)
            {
                try
                {
                    inputmodel obj = new inputmodel(args);
                    System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
                    client.Host = obj.SmtpHost;//如使用163的SMTP服务器发送邮件："smtp.163.com";
                    client.UseDefaultCredentials = true;
                    client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                    client.Credentials = new System.Net.NetworkCredential(obj.FromMail, obj.FromPwd);//账号、密码（用授权码比较安全）
                    client.Port = 25;

                    System.Net.Mail.MailMessage Message = new System.Net.Mail.MailMessage();
                    Message.From = new System.Net.Mail.MailAddress(obj.FromMail);
                    foreach (var p in obj.ToMail.Split(','))
                    {
                        Message.To.Add(p);//收件人
                        Console.WriteLine(p);
                    }
                    Message.Subject = obj.Subject;//主题
                    Message.Body = obj.Body;//内容
                    Message.SubjectEncoding = System.Text.Encoding.UTF8;//主题编码
                    Message.BodyEncoding = System.Text.Encoding.UTF8;//内容编码
                    Message.Priority = System.Net.Mail.MailPriority.High;//邮件级别
                    Message.IsBodyHtml = true;
                    client.Send(Message);
                    Console.WriteLine("发送成功");
                }
                catch (Exception e)
                {
                    Console.WriteLine($"error:{e.Message}");
                }

            }
            else
            {
                Console.WriteLine("必要参数如下：");
                Console.WriteLine("-f FromMail");
                Console.WriteLine("-t ToMail");
                Console.WriteLine("-s Subject");
                Console.WriteLine("-b Body");
                Console.WriteLine("-h SmtpHost");
                Console.WriteLine("-p FromPwd");
            }
        }

        private class inputmodel
        {
            public inputmodel(string[] args)
            {
                int i = -1;
                i = Array.FindIndex(args, o => o == "-f");
                if (i != -1)
                {
                    this.FromMail = args[i + 1];
                }
                i = Array.FindIndex(args, o => o == "-t");
                if (i != -1)
                {
                    this.ToMail = args[i + 1];
                }
                i = Array.FindIndex(args, o => o == "-s");
                if (i != -1)
                {
                    this.Subject = args[i + 1];
                }
                i = Array.FindIndex(args, o => o == "-b");
                if (i != -1)
                {
                    this.Body = args[i + 1];
                }
                i = Array.FindIndex(args, o => o == "-h");
                if (i != -1)
                {
                    this.SmtpHost = args[i + 1];
                }
                i = Array.FindIndex(args, o => o == "-p");
                if (i != -1)
                {
                    this.FromPwd = args[i + 1];
                }
            }
            public string FromMail { get; set; }
            public string ToMail { get; set; }
            public string Body { get; set; }
            public string Subject { get; set; }
            public string FromPwd { get; set; }
            public string SmtpHost { get; set; }
        }
    }