send email to one or many people now or in the future

send_o365.py

#!/usr/local/bin/python3
#
# send_o365.py
# /sable cantus/
# http://cantus.us/
###################

"""
Use in a delay_until script to send a timed message.

https://github.com/Narcolapser/python-o365
$ pip3 install O365

Save your credentials as an environment variable in .profile
export o365_email="your_email"
export o365_password="your_password"
"""
import os, time, datetime
from O365 import Message

# set the time to delay until YYYY, MM, DD, HH, MM, SS
delay_until = datetime.datetime(2018, 2, 7, 8, 5, 0)

fromAddr = os.getenv('o365_email')
password = os.getenv('o365_password')
toAddrs = ['jcantus@riohondo.edu']
messageSubject = 'Checking the inbox?'
messageBody = """
Sending messages from python.

/sable
"""

while datetime.datetime.now() < delay_until:
    time.sleep(1)

authenticiation = (fromAddr, password)
m = Message(auth=authenticiation)
for i in toAddrs:
    m.setRecipients(i)
    m.setSubject(messageSubject)
    m.setBody(messageBody)
    m.sendMessage()