---
title: "Introduction to SMTP Header Injections - Cybr"
description: "This ebook provides an overview of SMTP Header Injections: what they are, how they work, and how they can be used to attack applications."
url: https://cybr.com/ebooks/introduction-to-smtp-header-injections/
---

Free ebook

# Introduction to SMTP Header Injections

This ebook provides an overview of SMTP Header Injections: what they are, how they work, and how they can be used to attack applications.

This introduction to SMTP Header Injections is an excerpt from our Injection Attacks: The Free 2020 Guide course.

Course [Injection Attacks: The Free 2020 Guide](https://cybr.com/courses/injection-attacks-the-free-2020-guide)

![Intro to SMTP Header Injections Ebook](https://cybr.com/wp-content/uploads/2020/08/ebook_cover-1.png)

## What is in the ebook

### What’s Inside?

Learn what SMTP header injections are, how to perform them, and how to defend your applications against them.

## Author spotlight

![Christophe profile picture](https://cybr.com/wp-content/uploads/2020/05/5e4df3b707ef0-bpthumb-150x150.png)

### Christophe Limpalair

After learning first-hand why Application Security was important in his early teens, Christophe spent a number of years training individuals and organizations (SMB & F500) on how to use cloud services efficiently. After his journey of building two successful IT businesses to acquisition in the last six years, he realized that most also struggle with building secure software, so he co-founded Cybr and wrote this ebook as well as a corresponding course to help make the world a more secure place.

[See every Cybr ebook](https://cybr.com/ebooks/)