The POP3 and SMTP protocols

• The POP3 protocol (Post Office Protocol) is used to receive emails.
• The SMTP protocol (Simple Mail Transfer Protocol) is used to send emails.

• The reception of emails can also be taken into account by using the IMAP protocol.
• The SSL connections are supported.

Sending messages by using the SMTP protocol

1. Start an SMTP session:
   • by using an emailSMTPSession variable and EmailStartSession.
   • by using EmailStartSMTPSession.
2. Build the message to be sent in a variable of type Email or in the Email structure.
3. Send the message with EmailSendMessage.
4. Close the SMTP session with EmailCloseSession.

Receiving messages by using the POP3 protocol

1. Start a POP3 session:
   • by using an emailPOP3Session variable and EmailStartSession.
   • by using EmailStartPOP3Session.
   Example for starting a session by using an emailPOP3Session variable:
   
   // Start the messaging session
   MySession is emailPOP3Session
   MySession.ServerAddress = "pop.mycompany.us"
   MySession.Name = "user"
   MySession.Password = "secret"
   EmailStartSession(MySession)
   
2. Read the messages on the messaging server:
   • with the EmailGetAll function.
   • with a loop such as:
     • Example that is using an Email variable:
       
       MyMessage is Email
       EmailReadFirst(MySession, MyMessage)
       WHILE NOT MyMessage.Out
       // Place the process of the message read...
       ...
        
       EmailReadNext(MySession, MyMessage)
       END
       
     • Example that is using the Email structure:
       
       EmailReadFirst(MySession)
       WHILE NOT Email.Out
       // Place the process of the message read...
       ...
        
       EmailReadNext(MySession)
       END
       
   • or with a loop such as:
     
     MyMessage is Email
     FOR EACH MyMessage OF MySession
     // Place the process of the message read...
     ...
     END
     
3. Close the POP3 session with EmailCloseSession.