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python SMTP emailing function
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| # by Nikhil VJ, https://nikhilvj.co.in , https://github.com/answerquest | |
| # generic SMTP emailing function in Python, using SSL | |
| # will take values from these env params: | |
| # EMAIL_SERVER : SMTP server url | |
| # EMAIL_PORT : SMTP port num (must be the SSL port) | |
| # EMAIL_SENDER : Email account whose SMTP login you're using | |
| # EMAIL_PW : SMTP password of the email account (likely same as regular password used to login to that account) | |
| # tested and works well with BigRock.in hosting account's email accounts. | |
| # ..and with Google workspace account IF you enable "allow less secure apps". | |
| import smtplib, os | |
| from email.message import EmailMessage | |
| from email.headerregistry import Address | |
| def makeAddress(emails): | |
| # have to split "name@domain.com" into Address("name","name","domain.com"), and if multiple then have to string them together into tuple | |
| if type(emails) == str: | |
| holder = emails.strip().split('@') | |
| if len(holder) != 2: | |
| print("makeAddress: Invalid email id:",emails) | |
| return os.environ.get('EMAIL_SENDER','') | |
| return Address(holder[0],holder[0],holder[1]) | |
| elif type(emails) == list: | |
| collector = [] | |
| for oneEmail in emails: | |
| holder = oneEmail.strip().split('@') | |
| if len(holder) != 2: | |
| print("makeAddress: Invalid email id:",oneEmail) | |
| continue | |
| collector.append(Address(holder[0],holder[0],holder[1])) | |
| # after for loop: | |
| if len(collector): return tuple(collector) | |
| # default | |
| return os.environ.get('EMAIL_SENDER','') | |
| def sendEmail(content, subject, recipients, cc=None, html=None): | |
| ''' | |
| Emailing function. | |
| ''' | |
| # from https://docs.python.org/3/library/email.examples.html | |
| msg = EmailMessage() | |
| msg['Subject'] = subject | |
| msg['From'] = makeAddress(os.environ.get('EMAIL_SENDER','')) | |
| msg['To'] = makeAddress(recipients) | |
| if cc: msg['Cc'] = makeAddress(cc) | |
| msg.set_content(content) | |
| # adding html formatted body: from https://stackoverflow.com/a/58322776/4355695 | |
| if html: | |
| msg.add_alternative(f"<!DOCTYPE html><html><body>{html}</body></html>", subtype = 'html') | |
| print('to:',msg['To']) | |
| # login to server and send the actual email | |
| # try: | |
| server = smtplib.SMTP_SSL(os.environ.get('EMAIL_SERVER',''), os.environ.get('EMAIL_PORT','')) # We are specifying TLS here | |
| server.ehlo() | |
| server.login(os.environ.get('EMAIL_SENDER',''),os.environ.get('EMAIL_PW','')) | |
| status = server.send_message(msg) | |
| server.close() | |
| return status |
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