email-list.py

import smtplib
import time
import imaplib
import email
import sys
import tempfile

#Opens and reads any emails from Gmail
#In order to use fill in the required fields
#Make sure you adjust Gmail settings accordingly
#by going to settings -> forwarding and POP/IMAP -> enable IMAP
#and also allow access for less secure apps.

def read_email_from_gmail():

    FROM_EMAIL = "emailonvoice@gmail.com" #Enter the email name
    FROM_PWD = "emailonvoice" #Enter email password
    SMTP_SERVER = "imap.gmail.com"
    NUM_TO_READ = 5 #Replace with number of earliest emails desired

    try:

        #Establish a connection and login to the Gmail account
        mail = imaplib.IMAP4_SSL(SMTP_SERVER)
        mail.login(FROM_EMAIL,FROM_PWD)

        #Look for all emails in the inbox
        mail.select('inbox')
        type, data = mail.search(None, 'ALL')
        
        x = 0
        idList = []

        #Get a list of all the email ids, reverse it so that 
        #the newest ones are at the front of the list
        for id in data[0].rsplit():
            idList.append(id)

        idList = list(reversed(idList))



        #Fetch the first NUM_to_READ email subject lines and 
        #their recipients
        for id in idList:
            typ, data = mail.fetch(id, '(RFC822)')

            if x >= NUM_TO_READ:
                break
            else:
                x += 1
                msg = email.message_from_bytes(data[0][1])

                print('Message #', x)
                email_subject = msg['subject']
                email_from = msg['from']
                print('From : ' + email_from)
                print('Subject : ' + email_subject + '\n')




        #Allow the user to read the content of any emails
        while(1):
            message_to_read = input("Which message would you like to open? (-1 to quit) ")
            message_to_read = int(message_to_read)

            #Basic error checking
            while (message_to_read < 1) or (message_to_read > NUM_TO_READ):
                if (message_to_read == -1):
                    sys.exit()

                print("Please enter a valid message #")    
                message_to_read = input("Which message would you like to open?")
                
            #Parse the desired email
            typ, data = mail.fetch(idList[message_to_read-1], '(RFC822)')
            msg = email.message_from_bytes(data[0][1])
            #print(msg)

            print('\nReading message:\n')

            for part in msg.walk():
                if part.get_content_type() == "text/plain":
                    #print(part.get_payload(decode=True).decode('utf-8'))
                    file = part.get_payload(decode=True).decode('utf-8')
                    #print(file)
            
            for line in file:
                print(line, end = '', flush = True)
                
            print('\n')
            #Create a temp file to write email contents to
            #and then read from the temporary file
            #Note we can replace all the file code with a print statement
            #and disregard the whole issue with the temp file
            #This was simply for the purpose of using a tempfile with python
            '''
            tmp = tempfile.NamedTemporaryFile()

            with open(tmp.name, 'w') as f:
                for part in msg.walk():
                    if part.get_content_type() == "text/plain":
                        #print(part.get_payload(decode=True).decode('utf-8'))
                        file = part.get_payload(decode=True).decode('utf-8')
                        print(file)
                        f.write(part.get_payload(decode=True).decode('utf-8'))

            with open(tmp.name, 'r') as f:
                f.seek(0)
                for line in f:
                    print(line, end = '', flush = True)
            '''

    except:
        sys.exit()

    
read_email_from_gmail()