Babby's first SMTP mail client in python 3

mailClient.py

#!/usr/bin/python

# Name: Matthew Longley
# Date: 2012/09/25
# Course: COMP 3825-001
# Project #1 - Mail Client

import base64, getpass, socket, ssl

# Function - getServerAddr
# Description - requests the user to input the mail server's address and
#               returns that address
def getServAddr():
    s = input('Enter the address of the mail server: ')
    return s

# Function - getServerPort
# Description - requests the user to input the mail server's port number
#               and returns that number
def getServPort():
    while True:
        p = int(input('Enter the port number to connect to: '))
        if not (p < 0 or p > 65535):
            return p
        else:
            print('Invalid entry. Port number must be between 0 and 65,535.')

# Function - getFromAddr
# Description - requests the user to input the email address they're sending
#               from and returns that email address
def getFromAddr():
    f = input('Enter the email address you\'re sending from: ')
    return f

# Function - getRcptAddr
# Description - requests the user to input the email address they're sending
#               to and returns that email address
def getRcptAddr():
    r = input('Enter the email address you\'re sending to: ')
    return r

# Function - getMailMsg
# Description - requests the user to input a message terminated with a newline
#               to send and returns that message
def getMailMess():
    m = input('Enter a message to send (terminated with newline): ')
    return m

# Function - getUserName
# Description - requests the user to input their username to authenticate with the
#               mail server and returns it
def getUserName():
    u = input('Enter your username: ')
    return u

# Function - getPassword
# Description - requests the user to input their password to authenticate with the
#               mail server in a special hidden field and returns it
def getPassword():
    p = getpass.getpass('Enter your password: ')
    return p

# Function - queryUser
# Description - gathers information from the user, then passes it off to be used
#               with socket communication
def queryUser():
    mailserv = getServAddr()
    mailport = getServPort()
    mailfrom = getFromAddr()
    mailrcpt = getRcptAddr()
    mailmess = getMailMess()
    user = getUserName()
    psswd = getPassword()
    smtpSession(mailserv, mailport, mailfrom, mailrcpt, mailmess, user, psswd)

# Function - smtpSession
# Description - takes parameters detailing an email message and initiates an SMTP
#               session in order to send that message
def smtpSession(mailserv, mailport, mailfrom, mailrcpt, mailmess, user, psswd):
    # Instantiate a new socket object
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # Wrap socket with SSL context
    sockssl = ssl.wrap_socket(s)
    # Attempt to connect to the SMTP server
    sockssl.connect((mailserv, mailport))
    # Receive response from server and print it
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Say HELO and print response
    heloMesg = 'HELO Alice\r\n'
    print(heloMesg)
    sockssl.send(heloMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Authenticate with the server
    authMesg = 'AUTH LOGIN\r\n'
    crlfMesg = '\r\n'
    print(authMesg)
    sockssl.send(authMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    user64 = base64.b64encode(user.encode('utf-8'))
    pass64 = base64.b64encode(psswd.encode('utf-8'))
    print(user64)
    sockssl.send(user64)
    sockssl.send(crlfMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    print(pass64)
    sockssl.send(pass64)
    sockssl.send(crlfMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Tell server the message's sender
    fromMesg = 'MAIL FROM: <' + mailfrom + '>\r\n'
    print(fromMesg)
    sockssl.send(fromMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Tell server the message's recipient
    rcptMesg = 'RCPT TO: <' + mailrcpt + '>\r\n'
    print(rcptMesg)
    sockssl.send(rcptMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Give server the message
    dataMesg = 'DATA\r\n'
    print(dataMesg)
    sockssl.send(dataMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    mailbody = mailmess + '\r\n'
    print(mailbody)
    sockssl.send(mailbody.encode('utf-8'))
    fullStop = '\r\n.\r\n'
    print(fullStop)
    sockssl.send(fullStop.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Signal the server to quit
    quitMesg = 'QUIT\r\n'
    print(quitMesg)
    sockssl.send(quitMesg.encode('utf-8'))
    respon = sockssl.recv(2048)
    print(str(respon, 'utf-8'))
    # Close the socket to finish
    sockssl.close()

queryUser()