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How to Send Unlimited Bulk Emails using Python?

Send Unlimited Bulk Emails using Python

You have the names of a lot of friends and email addresses. And you want to give each of these contacts a message by adding “Dear [name]” at the top of the message. For the sake of convenience, you should store contact information instead of a database in a file. The template of the message you want to send can also be saved in a file.

Sending mass emails has always been a challenge for businesses that perform email marketing strategies to increase their leads. We all are aware that certain email services like Gmail have certain restrictions when it comes to sending bulk emails. This is because several email senders love their customers, and thus, they do not want to exploit its servers by sending bulk emails.

The use of programming languages like Php, Python, Perl, etc. allows businesses or entrepreneurs to schedule many emails (bulk emails) at one go.

Let us understand the fundamental steps of sending bulk emails.

Create Email List

At first, you must create a list of your recipients to whom you want to send a bulk email. Ensure that you have a clean list with the proper name and email address of the recipients. Getting a name will make the sending of bulk mail look more customized and will make you escape email spam filters.

Upload the CSV Format

For instance, you want to send 10000 emails in one go, for this, it will be better to optimize the process by creating five different email lists. Each list should not be more than 2000 emails. This is to ensure that your emails do not be spammed. Upload your first email list in a CSV file. This will remove emails that are spam and invalid emails. It reduces email bounces by verifying and cleaning the emails and improves your credibility in order to send bulk emails more effectively.

Compose the email

In this step, you will begin composing your actual communication with your recipients. Starting by having an engaging and creative subject line that forces recipients to press is a positive thing. Build a complete email now by making it personal with Mail Merge Tags. Cut to the chase provides your prospect with some meaning, and a straightforward call-to-action finishes your post.

PRO TIP: Make sure you don’t use spam terms and too many attachments in your email to maximize open rates when you send bulk emails. If the Gmail algorithm senses that you are sending spam emails, your email deliverability will be impaired.

Send or Schedule your mail

This brings the conclusion of the process in which we teach you how 10,000 emails can be submitted at once. You should submit or plan your camping plans. You can set a time period between two emails together with that. Sixty seconds is the safest practice. Follow the above measures after saying that to submit unrestricted bulk text, and build next campaigns with a 24-hour gap.

Here are the basic steps for sending emails using Python:

  1. Set up the SMTP server and log into your account.
  2. Create the MIMEMultipart message object and load it with appropriate headers for From, To, and Subject fields.
  3. Add your message body.
  4. Send the message using the SMTP server object.

Or do the following:

  1. Set up a secure connection using SMTP SSL() and .starttls()
  2. Use Python’s built-in smtplib library to send basic emails
  3. Send emails with HTML content and attachments using the email package
  4. Send multiple personalized emails using a CSV file with contact data
  5. Use the Yagmail package to send email through your Gmail account using only a few lines of code


Here you go! Hit the send and schedule button to set your email live.

Sending bulk emails using Python

Without any subject line or other additional detail, the Python smtplib module is essentially all you need to submit simple emails. But you do need a subject line and lots of detail for actual emails, maybe even photographs and attachments.

This is where the email kit for Python comes in. SMTP or Simple Mail Transfer Protocol is a Python module that is imported without downloading any modules from the pip. Bear in mind that delivering an email address using the email kit alone is not feasible. Both email and smtplib require a mix.

You have to say that this is the easiest way to send 10000 emails at once, and isn’t it feasible in a day’s time to do it? Many Pythonists send 10,000-50,000 emails a day using the process we have discussed above.


It’s not unusual for users to type an incorrect email address when collecting email lists, whether purposely or by accident. Inaccurate and undeliverable would be all the wrong email addresses attached to the lists. The percentage of bounce-back emails would grow drastically if you send emails to those addresses. This bounce-back adversely impacts the credibility of the mail server, which Yahoo, Gmail, AOL, Hotmail, and other ESPs continuously track.

If your IP address creates a bad reputation, common email services such as Gmail and the like can blacklist it. This ensures that the detection and elimination of unwanted email addresses are necessary if you intend to conduct bulk email marketing campaigns, such as newsletters or sales emails. Verification of Bulk Email means that the email list is clean and fully correct, which helps minimize bounce-back, saving you time and resources in the end.

Validating email addresses also allows you to maximize your marketing campaign’s deliverability and distinguish low-quality addresses from high-value contacts. You can enjoy peace of mind with every message by harnessing the power of email list validation services, knowing that your emails go out to real, live humans.

Click here for the complete and detailed code. [HOW TO SEND UNLIMITED BULK EMAILS USING PYTHON ]