A simple Python CLI to spoof emails.



A few Python programs designed to help penetration testers with email spoofing.


Mail Server

Email servers do not accept connections from normal computers. In an effort to limit the amount of spam, most MTAs will only accept connections from relays that have a fully-qualified domain name (FQDN). As such, the easiest way to use this project is from a Linux Virtual Private Server. There are several free or cheap options available, such as Digital Ocean, Linode, and Amazon EC2.

Once the server is set up, the next step is to install and start an SMTP server. This is required to actually send the spoofed emails. I personally use Postfix, though any will do. This script defaults to using localhost:25 for the mail server.

On Kali Linux, the easiest method of doing this is:

sudo apt-get install postfix sudo service postfix start

When installing postfix, specify Internet-facing and provide the correct FQDN when prompted.


This script has two dependencies:

  • dnspython
  • colorama

These can be installed using pip:

pip install -r requirements.txt

Basic Usage

Add the desired contents of the email in HTML format to an HTML file. Then, execute the following command:

./SimpleEmailSpoofer.py -e [Path to Email file] -t [To address] -f [From address] -n [From name] -j [Email subject]

Additional flags can be found by running

./SimpleEmailSpoofer.py -h


The Spoofcheck program, which allows users to identify whether or not domains are vulnerable to email spoofing, has moved to the following repository: