Email client from console

//***************************************************************************
// Author Iliya Popov 20.02.2021                                           //
//***************************************************************************

using System;
using System.Net;
using System.Net.Mail;

namespace EmailClient
{
    class EmailClient
    {
        private const string emServer = "mail.server";
        private const byte emPort = "server port";// default 25
        private const string fromEmail = "[email protected]";
        private const string passEmailAccount = "your password";

        static void Main(string[] args)
        {
            string toEml, subject, contentTxt;
            do
            {
                Console.Write("Send email to: ");
                toEml = Console.ReadLine();
                Console.Write("Subject: ");
                subject = Console.ReadLine();
                Console.WriteLine("Text: ");
                contentTxt = Console.ReadLine();
            }while (sendEmail(toEml, subject, contentTxt));
            Console.ReadKey();
        }
        private static Boolean sendEmail(string toTxt, string subjectTxt, string bodyTxt)
        {
            SmtpClient smClient = new SmtpClient(emServer, emPort);
            smClient.Credentials = new NetworkCredential(fromEmail, passEmailAccount);
            MailMessage msg = new MailMessage();
            msg.From = new MailAddress(fromEmail);
            msg.To.Add(new MailAddress(toTxt));
            msg.Subject = subjectTxt;
            msg.Body = bodyTxt;
            try
            {
                smClient.Send(msg);
                Console.WriteLine("message sent successfully!");
                return false;
            }
            catch (SmtpException ex)
            {
               Console.WriteLine("Error send msg, {0}", ex);
               return true;
            }
            finally
            {
                smClient.Dispose();
            }
        }
    }
}