static void Main(string[] args)
        {

            // Source of data. Fetch the emails from Database and put it to the list.
            List<string> listOfEmails = new List<string>() { "MariusJusc@gmail.com", "dorota.kortisova14@gmail.com" };

            foreach (var mail in listOfEmails)
            {
                try
                {
                    MailMessage mailM = new MailMessage();
                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");

                    // Email from which is being sent.
                    mailM.From = new MailAddress("EMAIL_FROM");

                    //Email to which is being sent.
                    // We take every email that is in the list (listOfEmails) and we put it to send.
                    mailM.To.Add(mail);

                    //Email subject.
                    mailM.Subject = "SUBJECT_EMAIL";

                    // Email message.
                    mailM.Body = "Sending email without any server....... Love you babe <3";

                    SmtpServer.Port = 587;
                    // Credentials from the account you are sending.
                    SmtpServer.Credentials = new System.Net.NetworkCredential("EMAIL", "PASSWORD");
                    SmtpServer.EnableSsl = true;

                    SmtpServer.Send(mailM);

                    //Check if the email was sent succesfuly.
                    Console.WriteLine("Email sent.");
                    Console.ReadLine();
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                    Console.ReadLine();
                }
            }
        }