from socket import *

# Message to send
msg = b"\r\n I love computer networks!"
endmsg = b"\r\n.\r\n"

# Our mail server is smtp.stud.ntnu.no
mailserver = 'smtp.stud.ntnu.no'

# Create socket called clientSocket and establish a TCP connection
# (use the appropriate port) with mailserver
#Fill in start

serverPort = 25
clientSocket = socket(AF_INET, SOCK_STREAM)
clientSocket.connect((mailserver, serverPort))

#Fill in end

recv = clientSocket.recv(1024)
print(recv)
if recv[:3] != b'220':
	print('220 reply not received from server.')

# Send HELO command and print server response.
heloCommand = b'HELO Alice\r\n'
clientSocket.send(heloCommand)
recv1 = clientSocket.recv(1024)
print(recv1)
if recv1[:3] != b'250':
	print('250 reply not received from server.')

# Send MAIL FROM command and print server response.
# Fill in start

mailfromCommand = b'MAIL FROM: <frommail@gmail.com>\r\n'
clientSocket.send(mailfromCommand)
recv2 = clientSocket.recv(1024)
print(recv2)

# Fill in end

# Send RCPT TO command and print server response.
# Fill in start

rcpttoCommand = b'RCPT TO:<tomail@gmail.no>\r\n'
clientSocket.send(rcpttoCommand)
recv3 = clientSocket.recv(1024)
print(recv3)

# Fill in end

# Send DATA command and print server response.
# Fill in start

dataCommand = b'DATA\r\n'
clientSocket.send(dataCommand)
recv4 = clientSocket.recv(1024)
print(recv4)

# Fill in end

# Send message data.
# Fill in start

messagedataCommand = msg
clientSocket.send(messagedataCommand)

# Fill in end

# Message ends with a single period.
# Fill in start

endswithsingleperiodCommand = endmsg
clientSocket.send(endswithsingleperiodCommand)
recv6 = clientSocket.recv(1024)
print(recv6)

# Fill in end

# Send QUIT command and get server response.
# Fill in start

quitCommand = b'QUIT\r\n'
clientSocket.send(quitCommand)
recv7 = clientSocket.recv(1024)
print(recv7)

# Fill in end