Bare minimum to send GMails

gmail.py

import smtplib
from pathlib import Path

tos = Path("emails_test.txt").read_text().strip()
tos_list = tos.split('\n')
tos = ", ".join(tos_list)

SUBJECT = 'TEST MAIL'
TEXT = 'Here is a message from python.'

# Gmail Sign In
gmail_sender = '[who_are_you]@gmail.com'
gmail_passwd = Path("google_app_passwd.txt").read_text().strip()

server = smtplib.SMTP('smtp.gmail.com', 587)
server.ehlo()
server.starttls()
server.login(gmail_sender, gmail_passwd)

BODY = '\r\n'.join(['To: %s' % tos,
                    'From: %s' % gmail_sender,
                    'Subject: %s' % SUBJECT,
                    '', TEXT])

try:
    server.sendmail(gmail_sender, tos_list, BODY)
    print ('email sent')
except:
    print ('error sending mail')

server.quit()