Rebex POP3

using (var pop3 = new Rebex.Net.Pop3())
{
  // connect and login to a POP3 server
  pop3.Connect("pop3.example.com", SslMode.Implicit);
  pop3.Login(username, password);

  // get and list of all messages and show them
  Pop3MessageCollection list = pop3.GetMessageList(Pop3ListFields.Fast);

  foreach (var info in list)
  {
    Console.WriteLine("{0}: {1}", info.SequenceNumber, info.UniqueId);
  }
}     

.NET library for communication with POP3 servers. Makes it possible to receive, list and remove e-mail messages. Supports TLS 1.3/1.2 and S/MIME.

Also includes SMTP library for sending e-mails using SMTP servers.