smtp examples

1. python3

   import smtplib
   
   mailserver = smtplib.SMTP('smtp.office365.com',587)
   mailserver.ehlo()
   mailserver.starttls()
   mailserver.login('account', 'password')
   message = ('Subject: testing\r\n\r\n')
   message = message + 'this is a test mail, don't reply to it.'
   mailserver.sendmail('from','to', message)
   

   python3 testing.py

2. c#

   using System.Net.Mail;
   
   class mail
   {
       public static void Main()
           {
               SmtpClient smtp = new SmtpClient();
               smtp.Host = "smtp.office365.com";
               smtp.Port = 587;
               smtp.EnableSsl = true;
               smtp.Credentials = new System.Net.NetworkCredential("account", "password");
               MailMessage message = new MailMessage("from", "to", "testing", "this is a test mail, don't reply to it.");
               smtp.Send(message);
           }
   }
   

   csc testing.cs

3. telnet

   https://docs.microsoft.com/en-us/exchange/mail-flow/test-smtp-with-telnet?view=exchserver-2019