Researchers Link poboxes.com Leak to 3,756 Exposed Passwords

poboxes.com Combolist Leak: 3,756 Records Exposed

In June 2026, HEROIC analysts traced a combolist uploaded to a Telegram channel back to poboxes.com. The file contained 3,756 records pairing email addresses with plaintext passwords and the URLs those credentials unlock.

Why This Is Dangerous

Because the passwords in this file are stored in plaintext, anyone who gets hold of it can start using the 3,756 email and password combinations immediately, no cracking tools required. An attacker can test these credentials against poboxes.com directly, and against any other service where the same password might have been reused.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated URLs

Why This Matters

A combolist tied to poboxes.com is exactly the kind of file criminals use for credential stuffing. Automated tools can run through all 3,756 email and password pairs in minutes, checking each one against poboxes.com and other popular services. Every successful match creates a real risk of account takeover, and if a password was reused elsewhere, it can lead to financial fraud or identity theft.

How a Combolist Leak Works

A combolist combines emails or usernames with matching passwords, usually gathered from older breaches or malware infections and repackaged into a single file for easy reuse. In this case, the file was tied specifically to poboxes.com accounts and uploaded to a Telegram channel, a common way for combolists to spread quickly among people looking for working logins.

Check If You Are Affected

If you have ever used a poboxes.com account, there is a chance your information is among these 3,756 exposed records. HEROIC's free breach scanner checks your email against more than 400 billion leaked records to tell you instantly whether you have been exposed. If you find a match, change that password everywhere you have reused it and turn on multi-factor authentication wherever it is available.