Attach a txt file in Python smtplib

Question

I am sending a plain text email as follows:

import smtplib from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText  def send_message():     msg = MIMEMultipart('alternative')     s = smtplib.SMTP('smtp.sendgrid.net', 587)     s.login(USERNAME, PASSWORD)      toEmail, fromEmail = [email protected], [email protected]     msg['Subject'] = 'subject'     msg['From'] = fromEmail     body = 'This is the message'      content = MIMEText(body, 'plain')     msg.attach(content)     s.sendmail(fromEmail, toEmail, msg.as_string()) 

In addition to this message, I would like to attach a txt file, 'log_file.txt'. How would I attach a txt file here?

Answer 1

The same way, using msg.attach:

from email.mime.text import MIMEText  filename = "text.txt" f = file(filename) attachment = MIMEText(f.read()) attachment.add_header('Content-Disposition', 'attachment', filename=filename)            msg.attach(attachment) 

Answer 2

Since Python3.6, I would recommend start using EmailMessage instead of MimeMultipart. Fewer imports, fewer lines, no need to put the recipients both to the message headers and to the SMTP sender function parameter.

import smtplib from email.message import EmailMessage  msg = EmailMessage() msg["From"] = FROM_EMAIL msg["Subject"] = "Subject" msg["To"] = TO_EMAIL msg.set_content("This is the message body") msg.add_attachment(open(filename, "r").read(), filename="log_file.txt")  s = smtplib.SMTP('smtp.sendgrid.net', 587) s.login(USERNAME, PASSWORD) s.send_message(msg) 

Even better is to install library envelope by pip3 install envelope that's aim is to handle many things in a very intuitive manner:

from envelope import Envelope from pathlib import Path  Envelope()\     .from_(FROM_EMAIL)\     .subject("Subject")\     .to("to")\     .message("message")\     .attach(Path(filename))\     .smtp("smtp.sendgrid.net", 587, USERNAME, PASSWORD)\     .send()