.net update, implemented base session, added test client
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e0b732267b
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11 changed files with 371 additions and 41 deletions
276
tests/smtpclient/Program.cs
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276
tests/smtpclient/Program.cs
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using System.Data;
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using System.Net;
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using System.Net.Mail;
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using System.Net.Sockets;
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using System.Text;
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namespace SmtpClient;
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internal class Program
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{
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private static string? _host = null;
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private static string? _username = null;
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private static string? _password = null;
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private static string? _from = null;
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private static List<string>? _rcpts = [];
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private static List<string>? _rcptsCc = [];
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private static string? _subject = null;
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private static string? _body = null;
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private static bool _secure = false;
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static async Task Main()
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{
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Console.WriteLine("Relay Test Client");
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Console.WriteLine("\nSelect Input:");
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Console.WriteLine("\t1-Static");
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Console.WriteLine("\t2-Interactive");
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switch (Console.ReadKey().Key)
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{
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case ConsoleKey.D1:
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case ConsoleKey.NumPad1:
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StaticInput();
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break;
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case ConsoleKey.D2:
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case ConsoleKey.NumPad2:
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InteractiveInput();
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break;
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default:
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return;
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}
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Console.WriteLine("\nSelect Method:");
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Console.WriteLine("\t1-Single Mail");
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Console.WriteLine("\t2-Single Mail (Raw Pipelined)");
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Console.WriteLine("\t3-Mutli Mail");
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try
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{
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switch (Console.ReadKey(true).Key)
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{
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case ConsoleKey.D1:
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case ConsoleKey.NumPad1:
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await SendAsync();
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break;
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case ConsoleKey.D2:
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case ConsoleKey.NumPad2:
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await SendPipelinedAsync();
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break;
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case ConsoleKey.D3:
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case ConsoleKey.NumPad3:
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await SendMultiAsync();
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break;
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default:
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Console.WriteLine("\nUndefined Method");
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break;
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}
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}
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catch (Exception ex)
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{
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Console.WriteLine(ex.ToString());
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}
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}
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static void StaticInput()
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{
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_host = "localhost:2525"?.Trim();
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_secure = false;
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_username = "relay@example.local";
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_password = "supersecret";
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_from = "me@example.local"?.Trim();
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_rcpts = "noreply@example.local"?.Trim()?.Split(';').ToList();
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_rcptsCc = [];
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_subject = "Testnachricht";
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_body = "Das ist eine Testnachricht.";
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}
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static void InteractiveInput()
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{
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Console.WriteLine("\nEnter Relay Host: ");
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_host = Console.ReadLine()?.Trim();
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Console.WriteLine("\nEnter Username (Optional): ");
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_username = Console.ReadLine()?.Trim();
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if (!string.IsNullOrWhiteSpace(_username))
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{
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Console.WriteLine("\nEnter Password: ");
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_password = Console.ReadLine()?.Trim();
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}
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Console.WriteLine("\nEnter Sender:");
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_from = Console.ReadLine()?.Trim();
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Console.WriteLine("\nEnter Receiver (delimit with ';'):");
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_rcpts = Console.ReadLine()?.Trim()?.Split(';').ToList();
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Console.WriteLine("\nEnter Cc Receiver (delimit with ';'):");
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_rcptsCc = Console.ReadLine()?.Trim()?.Split(';').ToList();
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Console.WriteLine("\nEnter Subject:");
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_subject = Console.ReadLine()?.Trim();
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Console.WriteLine("\nEnter Body:");
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_body = Console.ReadLine()?.Trim();
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}
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static async Task SendAsync()
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{
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var from = new MailAddress(_from!);
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var to = _rcpts!.Select(p => new MailAddress(p)).ToList();
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var cc = _rcptsCc!.Select(p => new MailAddress(p)).ToList();
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var firstTo = to.First();
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to.Remove(firstTo);
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using var message = new MailMessage(from, firstTo)
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{
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Priority = MailPriority.Normal,
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Subject = _subject ?? "Undefined",
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IsBodyHtml = false,
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Body = _body ?? string.Empty,
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};
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foreach (var x in to)
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message.To.Add(x);
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foreach (var x in cc)
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message.CC.Add(x);
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message.Attachments.Add(new Attachment("attachment.txt"));
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var credential = new NetworkCredential();
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if (!string.IsNullOrWhiteSpace(_username))
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{
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credential.UserName = _username;
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credential.Password = _password;
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}
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var host = _host;
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var port = 25;
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if (_host!.Contains(':'))
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{
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host = _host.Split(':')[0];
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port = int.Parse(_host.Split(":")[1]);
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}
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using var smtp = new System.Net.Mail.SmtpClient(host, port)
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{
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UseDefaultCredentials = false,
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Credentials = credential,
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EnableSsl = _secure,
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DeliveryMethod = SmtpDeliveryMethod.Network
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};
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await smtp.SendMailAsync(message);
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}
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static async Task SendMultiAsync()
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{
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var from = new MailAddress(_from!);
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var to = _rcpts!.Select(p => new MailAddress(p)).ToList();
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var cc = _rcptsCc!.Select(p => new MailAddress(p)).ToList();
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var firstTo = to.First();
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to.Remove(firstTo);
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using var message = new MailMessage(from, firstTo)
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{
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Priority = MailPriority.Normal,
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Subject = _subject ?? "Undefined",
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IsBodyHtml = false,
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Body = _body ?? string.Empty
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};
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foreach (var x in to)
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message.To.Add(x);
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foreach (var x in cc)
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message.CC.Add(x);
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message.Attachments.Add(new Attachment("attachment.txt"));
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var credential = new NetworkCredential();
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if (!string.IsNullOrWhiteSpace(_username))
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{
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credential.UserName = _username;
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credential.Password = _password;
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}
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var host = _host;
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var port = 25;
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if (_host!.Contains(':'))
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{
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host = _host.Split(':')[0];
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port = int.Parse(_host.Split(":")[1]);
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}
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using var smtp = new System.Net.Mail.SmtpClient(host, port)
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{
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UseDefaultCredentials = false,
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Credentials = credential,
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EnableSsl = _secure,
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DeliveryMethod = SmtpDeliveryMethod.Network
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};
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await smtp.SendMailAsync(message);
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await smtp.SendMailAsync(message);
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}
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static async Task SendPipelinedAsync()
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{
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var raw = "EHLO SmtpClient\r\n";
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if (!string.IsNullOrWhiteSpace(_username))
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{
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raw += $"AUTH PLAIN {Convert.ToBase64String(Encoding.UTF8.GetBytes($"\0{_username}\0{_password}"))}\r\n";
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}
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raw += $"MAIL FROM:<{_from}> SIZE=512\r\n";
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foreach (var rcpt in _rcpts!)
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{
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raw += $"RCPT TO:<{rcpt}>\r\n";
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}
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raw += "DATA\r\n";
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raw += "MIME-Version: 1.0\r\n";
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raw += $"From: {_from}\r\n";
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raw += $"To: {string.Join(", ", _rcpts!)}\r\n";
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if (_rcptsCc != null && _rcptsCc.Count > 0)
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{
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raw += $"Cc: {string.Join(", ", _rcptsCc!)}\r\n";
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}
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raw += "Date: 29 Oct 2025 21:10:56 +0100\r\n";
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raw += $"Subject:{_subject}\r\n";
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raw += "\r\n" ;
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raw += $"{_body}";
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raw += "\r\n.\r\n";
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raw += "QUIT\r\n";
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var bytes = Encoding.ASCII.GetBytes(raw);
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var sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
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var host = _host;
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var port = 25;
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if (_host!.Contains(':'))
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{
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host = _host.Split(':')[0];
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port = int.Parse(_host.Split(":")[1]);
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}
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await sock.ConnectAsync(host!, port);
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await sock.SendAsync(bytes);
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Console.WriteLine("wait 3 seconds...");
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await Task.Delay(3000);
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}
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}
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