.NET邮件处理库：MailKit

MailKit是一个跨平台的邮件客户端库

邮件发送

private static void SendingMessages()
{
    var message = new MimeMessage();
    message.From.Add(new MailboxAddress(FromName, FromAddress));
    message.To.Add(new MailboxAddress(ToUserName, ToUserAddress));
    message.Subject = "Hello,MailKit!";
    message.Body = new TextPart(MimeKit.Text.TextFormat.Plain)
    {
        Text = $"MailKit Demo"
    };

    using (var client = new SmtpClient())
    {
        client.ServerCertificateValidationCallback = (s, c, h, e) => true;
        client.Connect("smtp.163.com", 465, true);
        client.Authenticate(FromAddress, FromPassword);

        client.Send(message);
        client.Disconnect(true);
    }
}

邮件接收

private static void RetrievingMessagesWithIMAP()
{
    using (var client = new ImapClient())
    {
        client.ServerCertificateValidationCallback = (s, c, h, e) => true;
        client.Connect("imap.163.com", 993, true);
        client.Authenticate(FromAddress, FromPassword);

        var clientImplementation = new ImapImplementation
        {
            Name = "MailKitDemo",
            Version = "1.0.0"
        };
        var serverImplementation = client.Identify(clientImplementation);

        var inbox = client.Inbox;
        inbox.Open(FolderAccess.ReadOnly);

        Console.WriteLine("Total messages: {0}", inbox.Count);
        Console.WriteLine("Recent messages: {0}", inbox.Recent);

        for (int i = 0; i < inbox.Count; i++)
        {
            var message = inbox.GetMessage(i);
            Console.WriteLine("Subject: {0}", message.Subject);
        }

        client.Disconnect(true);
    }
}