Cyber security

MailChecker: Revolutionizing Email Validation Across Languages with Advanced Domain Database

In a modern world where email is so important, it’s very important to keep it safe. MailChecker becomes a key option because it can check emails in more than one language and in more advanced ways.

It does more than just check the format of email addresses to find temporary and spam ones. It has a library of over 55,000 disposable email domains. This tool can be used with many computer languages, which makes it an important tool for real and smooth digital communication.

This piece talks about the cool new features of MailChecker and how it helps make emails more reliable and keep users interested.

Cross-language email validation. Backed by a database of over 55 000 throwable email domains.

This will be very helpful when you have to contact your users and you want to avoid errors causing lack of communication or want to block “spamboxes”

Upgrade

From 3.x to 4.x

  • PHP
# import using the fully qualified name.
use Fgribreau\MailChecker;

// ...
echo MailChecker::isValid('myemail@yopmail.com');

From 1.x to 3.x

Mailchecker public API has been normalized, here are the changes:

  • NodeJS/JavaScript: MailChecker(email) -> MailChecker.isValid(email)
  • PHP: MailChecker($email) -> MailChecker::isValid($email)
  • Python
import MailChecker
m = MailChecker.MailChecker()
if not m.is_valid('bla@example.com'):
  # ...

became:

import MailChecker
if not MailChecker.is_valid('bla@example.com'):
  # ...

MailChecker currently supports:

  • NodeJS (CommonJS, Instructions)
  • JavaScript (Client-Side, Instructions)
  • PHP (Instructions)
  • Python (Instructions)
  • Ruby (Instructions)
  • Rust (Instructions)
  • Elixir (Instructions)
  • Clojure (Instructions)
  • Go (Instructions)
  • Easily add support for your own language with MailChecker template system and send us a pull-request!

Usage

NodeJS

var MailChecker = require('mailchecker');

if(!MailChecker.isValid('myemail@yopmail.com')){
  console.error('O RLY !');
  process.exit(1);
}

if(!MailChecker.isValid('myemail.com')){
  console.error('O RLY !');
  process.exit(1);
}

JavaScript

<script type="text/javascript" src="MailChecker/platform/javascript/MailChecker.js"></script>
<script type="text/javascript">
if(!MailChecker.isValid('myemail@yopmail.com')){
  console.error('O RLY !');
}

if(!MailChecker.isValid('myemail.com')){
  console.error('O RLY !');
}
</script>

PHP


use Fgribreau\MailChecker;

require __DIR__ . '/vendor/autoload.php';

if(!MailChecker::isValid('myemail@yopmail.com')){
  die('O RLY !');
}

if(!MailChecker::isValid('myemail.com')){
  die('O RLY !');
}

Python

pip install mailchecker
# no package yet; just drop in MailChecker.py where you want to use it.
from MailChecker import MailChecker

if not MailChecker.is_valid('bla@example.com'):
    print "O RLY !"

Django validator: https://github.com/jonashaag/django-indisposable

Ruby

require 'mail_checker'

unless MailChecker.valid?('myemail@yopmail.com')
  fail('O RLY!')
end

Rust

 extern crate mailchecker;

assert_eq!(true, mailchecker::is_valid("plop@plop.com"));
assert_eq!(false, mailchecker::is_valid("\nok@gmail.com\n"));
assert_eq!(false, mailchecker::is_valid("ok@guerrillamailblock.com"));

Elixir

Code.require_file("mail_checker.ex", "mailchecker/platform/elixir/")

unless MailChecker.valid?("myemail@yopmail.com") do
  raise "O RLY !"
end

unless MailChecker.valid?("myemail.com") do
  raise "O RLY !"
end

Clojure

; no package yet; just drop in mailchecker.clj where you want to use it.
(load-file "platform/clojure/mailchecker.clj")

(if (not (mailchecker/valid? "myemail@yopmail.com"))
  (throw (Throwable. "O RLY!")))

(if (not (mailchecker/valid? "myemail.com"))
  (throw (Throwable. "O RLY!")))

Go

package main

import (
  "log"
  
  "github.com/FGRibreau/mailchecker/platform/go"
)

if !mail_checker.IsValid('myemail@yopmail.com') {
  log.Fatal('O RLY !');
}

if !mail_checker.IsValid('myemail.com') {
  log.Fatal("O RLY !")
}

Installation

Go

go get https://github.com/FGRibreau/mailchecker

NodeJS/JavaScript

npm install mailchecker

Ruby

gem install ruby-mailchecker

PHP

composer require fgribreau/mailchecker

We accept pull-requests for other package manager.

Data sources

  $('td', 'table:last').map(function(){
    return this.innerText;
  }).toArray();

BloggingWV

  Array.prototype.slice.call(document.querySelectorAll('.entry > ul > li a')).map(function(el){return el.innerText});

Regenerate libraries from list.txt

Just run (requires NodeJS):

npm run build

Development

Development environment requires docker.

# install and setup every language dependencies in parallel through docker
npm install

# run every language setup in parallel through docker
npm run setup

# run every language tests in parallel through docker
npm test
Varshini

Varshini is a Cyber Security expert in Threat Analysis, Vulnerability Assessment, and Research. Passionate about staying ahead of emerging Threats and Technologies.

Recent Posts

WhatsMyName App – Find Anyone Across 640+ Platforms

Overview WhatsMyName is a free, community-driven OSINT tool designed to identify where a username exists…

4 days ago

Analyzing Directory Size Linux Tools Explained

Managing disk usage is a crucial task for Linux users and administrators alike. Understanding which…

4 days ago

Understanding Disk Usage with du Command

Efficient disk space management is vital in Linux, especially for system administrators who manage servers…

4 days ago

How to Check Directory Size in Linux

Knowing how to check directory sizes in Linux is essential for managing disk space and…

4 days ago

Essential Commands for Linux User Listing

Managing user accounts is a core responsibility for any Linux administrator. Whether you’re securing a…

4 days ago

Command-Line Techniques for Listing Linux Users

Linux offers powerful command-line tools for system administrators to view and manage user accounts. Knowing…

5 days ago