MailKit.Net.Smtp.SmtpClient.Send不能在linux上运行

sudo apt-get update
sudo apt-get install -y dotnet-sdk-3.1

dotnet add package System.Security.Cryptography.Native.OpenSsl

using MailKit.Net.Smtp;
using MimeKit;

class Program
{
    public static async Task Main(string[] args)
    {
        var message = new MimeMessage();
        message.From.Add(new MailboxAddress("From Name", "from@example.com"));
        message.To.Add(new MailboxAddress("To Name", "to@example.com"));
        message.Subject = "Hello!";

        var bodyBuilder = new BodyBuilder();
        bodyBuilder.TextBody = "This is a test email.";
        message.Body = bodyBuilder.ToMessageBody();

        using var smtpClient = new SmtpClient();
        smtpClient.Connect("smtp.example.com", 587, true);
        smtpClient.Authenticate("username", "password");
        await smtpClient.SendAsync(message);
        smtpClient.Disconnect(true);
    }
}