Python – Sending attachment in HTML email with Python

emailemail-attachmentshtmlpython

I saw there are a few somewhat similar questions on stack overflow already, but I couldn't find a solution to my specific problem in them.

I am trying to use Python to send an HTML email with a .pdf attachment. It seems to work fine when I check my email on gmail.com, but when I check the message through apple's Mail program, I do not see the attachment. Any idea what is causing this?

My code is below. A lot of it is copied from various places on stack overflow, so I do not completely understand what each part is doing, but it seems to (mostly) work:

import smtplib  
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText                    
from email.mime.application import MIMEApplication
from os.path import basename
import email
import email.mime.application

#plain text version
text = "This is the plain text version."

#html body
html = """<html><p>This is some HTML</p></html>"""

# Create message container - the correct MIME type is multipart/alternative.
msg = MIMEMultipart('alternative')
msg['Subject'] = "Deliverability Report"
msg['From'] = "me@gmail.com"
msg['To'] = "you@gmail.com"

# Record the MIME types of both parts - text/plain and text/html
part1 = MIMEText(text, 'plain')
part2 = MIMEText(html, 'html')

# create PDF attachment
filename='graph.pdf'
fp=open(filename,'rb')
att = email.mime.application.MIMEApplication(fp.read(),_subtype="pdf")
fp.close()
att.add_header('Content-Disposition','attachment',filename=filename)

# Attach parts into message container.
msg.attach(att)
msg.attach(part1)
msg.attach(part2)

# Send the message via local SMTP server.
s = smtplib.SMTP()
s.connect('smtp.webfaction.com')
s.login('NAME','PASSWORD')
s.sendmail(msg['From'], msg['To'], msg.as_string())
s.quit()

I'm not sure if it is relevant, but I am running this code on a WebFaction server.

Thanks for the help!

Best Answer

Use

msg = MIMEMultipart('mixed')

instead of 'alternative'

Related Solutions

Javascript – How to validate an email address in JavaScript

Using regular expressions is probably the best way. You can see a bunch of tests here (taken from chromium)

function validateEmail(email) {
    const re = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(String(email).toLowerCase());
}

Here's the example of regular expresion that accepts unicode:

const re = /^(([^<>()[\]\.,;:\s@\"]+(\.[^<>()[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i;

But keep in mind that one should not rely only upon JavaScript validation. JavaScript can easily be disabled. This should be validated on the server side as well.

Here's an example of the above in action:

function validateEmail(email) {
  const re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  return re.test(email);
}

function validate() {
  const $result = $("#result");
  const email = $("#email").val();
  $result.text("");

  if (validateEmail(email)) {
    $result.text(email + " is valid :)");
    $result.css("color", "green");
  } else {
    $result.text(email + " is not valid :(");
    $result.css("color", "red");
  }
  return false;
}

$("#email").on("input", validate);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<label for=email>Enter an email address:</label>
<input id="email">
<h2 id="result"></h2>

Python – How to execute a program or call a system command

Use the subprocess module in the standard library:

import subprocess
subprocess.run(["ls", "-l"])

The advantage of subprocess.run over os.system is that it is more flexible (you can get the stdout, stderr, the "real" status code, better error handling, etc...).

Even the documentation for os.system recommends using subprocess instead:

The subprocess module provides more powerful facilities for spawning new processes and retrieving their results; using that module is preferable to using this function. See the Replacing Older Functions with the subprocess Module section in the subprocess documentation for some helpful recipes.

On Python 3.4 and earlier, use subprocess.call instead of .run:

subprocess.call(["ls", "-l"])

Best Answer

Related Solutions

Javascript – How to validate an email address in JavaScript

Python – How to execute a program or call a system command

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