Python Send Email Without Smtp Server – In this article I will teach you something interesting. I’m going to teach you how to send an email!
Don’t get me wrong though. I’m not going to teach you how to log into your gmail and send an email to your best friend.
Python Send Email Without Smtp Server
Let’s say this database stores the names of your customers and the products they might be interested in based on their previous purchases.
How To Send Email Using Python?
Now you want to send each customer a personalized email with their name and new products they might be interested in.
This is where programming comes in, as you can programmatically send emails with dynamic bodies to everyone. So instead of writing thousands of letters by hand, you can just write a few lines of code.
Rather than rush into it and show you the code, it’s better to first learn a little theory about how email works.
It’s actually quite simple. It is a set of rules that govern how two mail servers interact with each other.
Email Verification · Github Topics · Github
That being said, you don’t need to know how SMTP works to send email using python, but it is very valuable.
Python provides you with the smtplib module, which takes all the complexity out of SMTP. This module basically implements the SMTP protocol for you. So all you have to do is tell this module to send an email, sit back, relax and watch smtplib do all the hard work for you.
Before I tell you about this incredibly easy way to send an email using python, I want to start by showing you the code to show you how simple, short and easy it is.
This python3 code assumes you have a gmail email account, but the same concepts will work for any email service.
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Code represents a client program that interacts with your email server (running at smtp.gmail.com) and asks the server to send the message “this message is from Python” to the email address “[email protected]”.
If you take the code I wrote above and try to run it right after replacing the login info with your own, you’ll get a similar error.
By default, Gmail tries to protect your email by preventing third parties from accessing it. You can manage your Gmail security settings by following this link and allowing less secure apps. It is disabled by default, so you need to enable it.
Now listen to me. I strongly recommend not allowing less secure apps to connect to your gmail mail as this will open the door to some security attacks.
Smtp Relay · Github Topics · Github
So here’s what I want you to do: You should only allow less secure apps to test and test your code, but remember to reset your security settings when you’re done.
To be safe, rerun the code with the correct credentials and destination email address (you can send this email to yourself to make sure the code actually works).
I sent myself an email using the code above and this is what I got in my inbox.
The python smtplib module defines an SMTP client object that can be used to send email to any machine running an SMTP server.
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In our case, the machine running the SMTP server is smtp.gmail.com, and we want our client application (running on our laptop) to be able to communicate with that server.
You can create a contact object using smtplib.SMTP or smtplib.SMTP_SSL. The difference is that smtplib.SMTP_SSL uses a secure encrypted SSL protocol to connect to the SMTP server, whereas smtplib.SMTP does not.
Gmail doesn’t allow communication over channels without SSL or TLS, so we can’t talk to gmail using smtplib.SMTP.
We will need to do some of these settings to get our client to talk to the gmail SMTP server correctly.
Configure Email Server Settings
SMTP Server Address: This is the IP address or domain name of the machine running the SMTP server. For Gmail, this address is smtp.gmail.com
SSL Required: This indicates whether the SMTP server requires communication over a secure, encrypted SSL channel. This is a mandatory requirement for Gmail. This is why we use smtplib.SMTP_SSL instead of smtplib.SMTP.
Of course gmail asks for username and password so we need authentication.
Port for SSL: This is the port that the SMTP server listens on. The port number (465) uniquely identifies the full SMTP server address with the SMTP server address (smtp.gmail.com) so that our client code can communicate with it.
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The difference between a server address and a port number is that a server address will only direct you to the machine running the SMTP server.
But ONLY the SMTP server will listen on port 465, even if there are multiple programs running on that machine.
If you want to improve your understanding of networking concepts, I recommend this book by Ross and Kuras. This book is written in a very interesting way and is very easy to understand.
I hope this code made more sense for you. The arguments to the SMTP_SSL() function are the address and port number of the SMTP server.
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This function attempts to connect to the SMTP server located at smtp.gmail.com and listens on port 465 over a secure SSL encrypted channel. It returns an smtp object named by a variable named server.
From the previous discussion we know that gmail requires authentication. If you try to send an email without first verifying it, the gmail server will return a verification error.
Needless to say, replace the method arguments in the above code with your credentials.
The smtp objects have another method, sendmail, which requests the SMTP server to send email. It contains the source email address, the destination email address, and the content of the email message.
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After using the above code to send an email, you will see that the email header is missing from your gmail inbox.
Check out the e-book. This will make your email life easier. You can achieve your goal without additional modules, but it will require a more detailed study of the SMTP protocol.
Kareem received his PhD in Computer Science from the University of California, Santa Barbara. He has more than 3 years of experience teaching CS to undergraduates, more than 5 years of research experience, and currently works for a Fortune 100 company. He is interested in distributed systems, machine learning, fitness, and soccer. Sending email is a very common task in any system. Maybe you found this tutorial because you want to send email using Python. In this tutorial, we’ll learn how to send emails with and without HTML content in Python.
After finishing the tutorial, I combined all the code samples into one nice CLI. For a complete code example, check out the project repository and check out the beautiful CLI below.
How To Send An Email With Python And Smtplib? (in 5 Lines)
To start the tutorial, we set up an SMTP server and logged in to send email. For training purposes, we have two options to connect the SMTP server to a local SMTP server or a third-party SMTP service. In this article, we will use Gmail SMTP, if you want to use another service like Outlook, Mailchimp, etc., let us know.
For debugging purposes, Python provides us with a local SMTP launcher built in Python. With help
, we start an internal SMTP server. The server will not send email to the Internet. Instead, it will print an email to your console.
Because Gmail is popular. For the rest of the tutorial, we’ll be using Gmail SMTP for development. To get started, follow the exact steps below to create your Gmail account.
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Make sure we always use a secure connection when connecting to Gmail SMTP. With a secure connection, your messages and credentials are encrypted, so it’s not easy for other guys to access your personal information.
Gmail SMTP allows us to create secure connections using SSL (Secure Sockets Layer) or TLS (Transport Layer Security) protocols. following this,
The code below is an example of how to establish an SSL connection to an SMTP server. Gmail’s SMTP server
To set up a TLS connection, we first set up a secure SMTP connection. After that, encrypt using an unsecured connection
How To Send Emails With Python
Before we send an email using Python, we’ll send a simple email with just plain text. Any text editor can create the text of an email. No HTML tags, CSS classes or attachments.
Most of the time, when you send an email, you want to send an elegant email.
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