send-email

send-email.py

#!/usr/bin/env python3

'''Usage:
  {} TO_ADDR SUBJECT CONTENT_TEXT_FILE_PATH [ATTACHMENTS]
'''

import email.message
import email.utils
import os
import smtplib
import sys
import json

SECRETS_FILE = '~/.email_secrets.json'

def make_email(from_addr, to_addr, subject, content=None, attachments=None, headers=None):
    msg = email.message.EmailMessage()
    msg['Date'] = email.utils.formatdate()
    msg['Subject'] = subject 
    msg['From'] = from_addr
    msg['To'] = to_addr
    if headers is not None:
        for k, v in headers.items():
            msg[k] = v
    if content is None:
        content = ''
    try:
        msg.set_content(content, cte="7bit", charset='US‑ASCII')
    except:
        msg.set_content(content, cte="quoted-printable", charset='UTF-8')
    if attachments is not None and len(attachments) > 0:
        for attachment in attachments:
            with open(attachment, 'rb') as f:
                msg.add_attachment(f.read(), 'application', 'octet-stream',
                     filename=os.path.basename(attachment))
        msg.set_boundary('=' * 16)
    return msg


def send_email(dst, subject, content, attachments):
    with open(os.path.expanduser(SECRETS_FILE), 'rb') as f:
        secrets = json.load(f)
    with open(content, 'r') as f:
        msg = make_email(
            secrets['FROM_ADDR'], dst, subject, f.read(), attachments, secrets.get('HEADERS'))
    print(str(msg))
    s = smtplib.SMTP_SSL(secrets['SMTP_HOST'])
    s.login(secrets['SMTP_USER'], secrets['SMTP_PASS'])
    s.send_message(msg)
    s.quit()

if __name__ == '__main__':
    if len(sys.argv) < 4:
        sys.stderr.write(__doc__.format(sys.argv[0]))
        sys.exit(1)
    send_email(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4:])