gmailer.py

import smtplib, os
from email import Encoders
from email.Utils import COMMASPACE, formatdate
from email.MIMEText import MIMEText
from email.MIMEBase import MIMEBase
from email.MIMEMultipart import MIMEMultipart
import argparse
import sys 

#INFO
#Can be used with gmail accounts only.
#Can send to multiple recievers at once.

#TODO
#1. Catch for wrong username and password
#2. Catch for invalid sender or reciever
#3. Catch for file size greater than 25 mb

parser = argparse.ArgumentParser()
parser.add_argument('-u', '--username', nargs='?', required=True)
parser.add_argument('-p', '--password', nargs='?', required=True)
parser.add_argument('-s', '--sender', nargs='?', required=True)
parser.add_argument('-r', '--recievers', nargs='+', required=True)
parser.add_argument('-a', '--attachments', nargs='+', default = []) 
parser.add_argument('-m', '--message', nargs='+', required=True)
parser.add_argument('-S', '--subject', nargs='+', required=True)

args = parser.parse_args()

username = args.username
password = args.password
sender = args.sender
recievers = args.recievers
files = args.attachments
subject = ' '.join(args.subject)
message = ' '.join(args.message)

def send_mail(send_from, send_to, subject, text, files=[], server="localhost"):
    msg = MIMEMultipart()
    msg['From'] = send_from    
    msg['To'] = COMMASPACE.join(send_to)  
    msg['Date'] = formatdate(localtime=True)    
    msg['Subject'] = subject    
    msg.attach( MIMEText(text) )
    for f in files:
        part = MIMEBase('application', "octet-stream")
        part.set_payload( open(f,"rb").read() )
        Encoders.encode_base64(part)
        part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(f))
        msg.attach(part)
    server.sendmail(send_from, send_to, msg.as_string())

server = smtplib.SMTP('smtp.gmail.com')
server.starttls()
server.login(username,password)

send_mail(sender, recievers, subject, message, files, server)
server.close()