- Send Emails to Multiple Addresses Using Python
smtplibModule in Python
Send an Email Using
- Control Access to Less Secure Apps
Send an Email Using
In this article, we will demonstrate how to use the Python programming language to send emails to various recipients using various email addresses. Specifically, we will be sending emails to many different people.
Send Emails to Multiple Addresses Using Python
Python is more than simply a programming language for building websites or working with Artificial Intelligence.
It is a language that can be used on the backend, front end, or the whole stack of a web application. Therefore its versatility makes it a helpful tool.
Python has now evolved into a language that can also be used to automate emails. Tasks that involve email can be easily automated using Python.
We need a few lines of code to use Python to send emails to several different recipients at the same time.
In this Python article, we will demonstrate how to use Python to send emails to several recipients simultaneously.
It is not very difficult to send emails using Python, particularly if you use a module such as
smtplib. This library will take care of all you need to know to connect to a mail server and deliver the message for you.
We will take you step-by-step through configuring a Python script so that it can send emails to many different addresses. In addition, we will include some example codes for you to use as we get started.
If we want to utilize
smtplib, you first need to establish a connection to the server. We will need to supply the server’s location and our login and password to access the file.
After establishing the connection, we can begin sending messages to one another.
To send a message, we will need first to build a message object and then supply the headers for the
to, and topic fields. We can also add
After the message has been produced, we will have the option to add text, HTML, or attachments.
When we are ready to send the message, we can use the
sendmail() function included in the
smtplib module. This technique requires a list of receivers, then communicates with each individual on the list.
So let’s begin with
smtplib Module in Python
smtplib is a built-in module in Python. It has client session objects.
smtplib defines an
SMTP client session object. This object can be used to deliver email to any computer connected to the internet that is running an
ESMTP listener daemon.
Application programmers are not expected to use this module in their work directly. System administrators who are building scripts to automate the activities of system management will find it valuable to have access to this resource.
smtplib Module Classes
smtplib module defines the following classes:
SMTP- An SMTP client session object
SMTP_SSL- An SMTP client session over an SSL connection
IMAP4client session object
POP3client session object
All of these classes have the same methods and attributes.
smtplib Module Exceptions
smtplib module also defines the following exceptions:
SMTPException- Base class for all SMTP-related exceptions.
SMTPServerDisconnected- The SMTP server disconnected unexpectedly.
SMTPResponseException- The SMTP server returned an error code other than
SMTPSenderRefused- The SMTP server refused to accept the sender’s address.
SMTPRecipientsRefused- The SMTP server refused to accept all recipient addresses.
SMTPDataError- The SMTP server does not accept the message data.
SMTPConnectError- The SMTP server could not be connected.
SMTPHeloError- The SMTP server did not respond properly to the
SMTPNotSupportedError- The SMTP server does not support the requested feature.
SMTPAuthenticationError- The SMTP server did not accept the username/password.
Let’s move to the main topic of sending emails using Python.
Send an Email Using
smtplib in Python
It’s no secret that Google has been cracking down on
Less Secure App access to Gmail accounts. This has been a great source of frustration for many users, especially those who rely on Python to send emails through their Gmail accounts.
Unfortunately, Google no longer allows
Less Secure App access to Gmail accounts. If we want to use Python’s
smtplib module to send emails through our Gmail account, we will need to take some extra steps to ensure your account is secure.
So, the first thing we will do is control access to
Less Secure Apps.
Control Access to Less Secure Apps
As you may have heard, Google has stopped providing support for a feature known as
Less Secure App. This feature allowed you to access your Gmail account using a program like Microsoft Outlook, Thunderbird, or Apple Mail.
This may sound like pain; it’s a good thing, though!
Less Secure Apps are a major security risk, and by Google no longer supporting them, they’re helping to keep your account safe.
As in our case, we want Python’s
smtplib to access our Gmail, don’t worry! We don’t need to give our Gmail account password.
We can switch securely by following these simple steps:
Use a Secure Connection
Always use a secure connection when sending emails through your Gmail account. Gmail offers two different types of connections: SSL and TLS.
SSL (Secure Sockets Layer) is the older of the two protocols and is not as secure as TLS. However, it’s still more secure than an unencrypted connection.
TLS (Transport Layer Security) is a newer and more secure protocol than SSL. Gmail will automatically use TLS if it’s available.
Log in to Gmail Account
Before we send any email using the Python module
smtplib, we must log into our account first because we need our email and a password generated from our Gmail account.
Once we log into our account, we need to click on the icon of our Gmail profile. We will see a drop-down and an option with
[Manage your Google Account].
We will have to click on it to move to the next step.
After clicking on
[Manage your Google Account], we will be redirected to the next page where we can find the
Securityoption. We will have to click on it.
Signing in to Google
After we click on
Security, we will be redirected to another part of Gmail where we can find the
Signing in to Googleoption.
The image below shows us that
Signing in to Googlehas two options.
And another important security measure is to enable two-factor authentication for your Gmail account. Two-factor authentication adds an extra layer of security by requiring you to enter a code from your phone and your password.
Now we will have to turn on the
2-step Verificationfirst. Which is very easy; you can do it within a few seconds.
After we are done with 2 step verification, we will have to go with
App Passwordsto generate a password from our Gmail account.
When we click on it, we will be redirected to the below-mentioned page.
Now we have to check options in
Select App and
In our case, we will select
Windows Computer or any other device to move further and get a password. After this, we will click on the
Once we click the
Generate button, we will be redirected to another page where we can see Google has generated a password for our email, which we can use while using Python’s
smtplib to send emails.
Now that we have securely generated a password for our email. We can now move to Python to send emails using
Send an Email Using
smtplib in Python
smtplib module makes it easy to send emails using Python. There are just a few steps you need to take to send an email using
First, we need to create an SMTP object. Next, we need to connect to the server using the
And finally, we can send an email using the
msg.set_content method. Let’s dive deep into the steps of code.
We will first import
smtplib. This is the protocol, and this protocol helps in sending the email.
email.message import EmailMessageto use email format in Python. Like
Now we will write our email addresses in inverted commas. The email we want to send email from.
We will now write the generated password that we have earlier generated through Gmail.
Access Gmail Database
To access Gmail’s database, we will use
smtplib.SMTP_SSL('smtp.gmail.com', 465). It allows us to get connected with Gmail’s database.
Now we will use the
server.logincommand to log into the email through the generated password.
We will now use
v=server.send_messageto send the message through email.
After the email is sent successfully, we will see a printed message,
Email has been sent successfully.
import smtplib from email.message import EmailMessage EMAIL_ADDRESS = "firstname.lastname@example.org" EMAIL_PASSWORD = '***************' email = EmailMessage() email['Subject'] = input(str("Email Subject: ")) email['From'] = "Your Name" email['To'] = 'email@example.com' email.set_content('Write Your message here') server = smtplib.SMTP_SSL('smtp.gmail.com', 465) server.login(EMAIL_ADDRESS, EMAIL_PASSWORD) server.send_message(email) server.quit() print("Email has been sent successfully")
Email Subject: Email sent using python Email has been sent successfully
This is how we can send an email to one email address. But if we want to send emails to multiple addresses, we can separate our emails using a comma and send emails to as many addresses as we want.
import smtplib from email.message import EmailMessage EMAIL_ADDRESS = "firstname.lastname@example.org" EMAIL_PASSWORD = '*************' email = EmailMessage() email['Subject'] = input(str("Email Subject: ")) email['From'] = "Your Name" email['To'] = 'email@example.com,firstname.lastname@example.org,email@example.com' email.set_content('Write Your message here') server = smtplib.SMTP_SSL('smtp.gmail.com', 465) server.login(EMAIL_ADDRESS, EMAIL_PASSWORD) server.send_message(email) server.quit() print("Email has been sent successfully to all the addresses")
Email Subject: I have a news for you all Email has been sent successfully to all the addresses
Our email is sent to all the mentioned addresses.
So this brings us to the end of the discussion! We can quickly and easily send emails to multiple people at once using Python, which only requires a few lines of code on your part.
We hope you find this article helpful in understanding how to send emails to multiple addresses using Python.