Hackus Mail Checker Install May 2026

Open your terminal and run:

sudo apt update && sudo apt upgrade -y
sudo apt install python3 python3-pip git dnsutils -y

For CentOS/RHEL:

sudo yum install epel-release -y
sudo yum install python3 python3-pip git bind-utils -y

Once these are installed, verify Python version: hackus mail checker install

python3 --version

You need 3.8 or higher.

cd mailchecker
sudo chmod +x mailchecker.py

Hackus Mail Checker is a lightweight tool (often written in Python or Bash) designed to check whether an email address exists, is deliverable, and is not a disposable/temporary address. It’s useful for: Open your terminal and run: sudo apt update

⚠️ Legal & Ethical Note
Use this tool only on email addresses you own or have explicit permission to test. Unauthorized verification may violate terms of service or laws (e.g., CFAA, GDPR).

The installation is useless if you cannot connect it to your workflow. Here is how to integrate. For CentOS/RHEL: sudo yum install epel-release -y sudo

| Output | Meaning | |---------------|-------------------------------------------------------------------------| | EXISTS | The email address is valid and accepts mail. | | NOT EXISTS | The mailbox does not exist (SMTP 550 or 5.1.1 error). | | UNKNOWN | The server did not disclose existence (often due to security settings). | | TIMEOUT | The SMTP server did not respond (firewall or rate limiting). |