import time
import smtplib
import threading

from email import encoders
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.mime.text import MIMEText

SMTP_HOST = "smtp.mail.yahoo.com"
SMTP_PORT = 587
SMTP_ACCO = "xxxxxxxxxxx@yahoo.com"
SMTP_PASS = "xxxxxxxxxxx"

FROM_ADDR = SMTP_ACCO

class myThread(threading.Thread):
    def __init__(self, toaddr):
        threading.Thread.__init__(self)
        self.toaddr = toaddr

    def run(self):
        threadLock.acquire()
        sendTo(self.toaddr)
        threadLock.release()

def sendTo(toaddr):
    outer = MIMEMultipart()
    outer['From'] = FROM_ADDR
    outer['To'] = toaddr
    outer['Subject'] = "Python email"

    body = "Hi, \nPython test mail."
    outer.attach(MIMEText(body, 'plain'))

    # attach file
    fp = open('file.pdf', 'rb')
    msg = MIMEBase('application', 'pdf')
    msg.set_payload(fp.read())
    fp.close()

    # Encode the payload
    encoders.encode_base64(msg)

    # Set the filename parameter
    msg.add_header('Content-Disposition', 'attachment', filename='file.pdf')
    outer.attach(msg)
    compose = outer.as_string()

    # Send the mail
    server = smtplib.SMTP(SMTP_HOST, SMTP_PORT)
    server.set_debuglevel(False) # show communicationwith the server

    #Next, log in to the server
    server.ehlo()
    server.starttls()
    server.ehlo()
    server.login(SMTP_ACCO, SMTP_PASS)

    server.sendmail(FROM_ADDR, toaddr, compose)

    # close server
    server.quit()

def main():
    # start time
    start = time.time()

    # send email to list recipients file
    f = open('recipients','r')
    for addr in f.readlines():
        t = myThread(addr)
        t.start()
        threads.append(t)
    f.close()

    # Wait for all threads to complete
    for t in threads:
        t.join()

    print('Time: ', time.time() - start)

# init threadlock
threadLock = threading.Lock()
threads = []

if __name__ == '__main__':
    main()