46,942 Polish Email Accounts Exposed in the Poland Good Mails Leak

HEROIC analysts identified a stealer log labeled "Poland Good Mails 50.000 3," the third installment in a series uploaded to a Telegram channel and dated to March 28, 2026. Despite the "50,000" in its file name, the verified portion of this log contains 46,942 working email accounts, each paired with a plaintext password and the login URL for the account. Every record is tied to a Polish email user, making this one of the larger regional stealer log releases HEROIC has tracked recently.

Why This Is Dangerous

The "Good Mails" label in the file's name signals that these credentials have already been tested and confirmed to work, meaning an attacker doesn't need to guess or brute-force anything. With almost 47,000 verified logins concentrated in a single country, this file gives cybercriminals a ready-made list to target Polish consumers specifically, whether through direct account takeover or by cross-referencing the emails against other services popular in Poland.

What Was Exposed

• 46,942 email addresses belonging to Polish accounts
• Plaintext passwords stored with no encryption
• Login URLs identifying the exact webmail or online service for each account

Why This Matters

A regional dump like this one is particularly attractive to attackers running localized scams, since messages and phishing attempts written in Polish and tailored to Polish banks or services are far more convincing to the people receiving them. Anyone in this file faces immediate risk of account takeover, and if a password was reused elsewhere, credential stuffing can spread the damage into banking, shopping, and social media accounts. From there, identity theft and financial fraud become very real possibilities for tens of thousands of people.

How "Good Mails" Stealer Logs Are Built

Infostealer malware infects devices through pirated downloads, fake software updates, or malicious attachments, then quietly harvests saved browser passwords and the pages they belong to. Criminals collect these logs from many infections, filter them by country and by whether the login still works, and package the results into a "good," or verified, list. Sorting logs by region, as seen in this Poland-focused release, lets sellers market the file to buyers who specifically want to target one country's population, increasing both its price and its danger.

Check If You Are Affected

If you have a Polish email account or bank online in Poland, it is worth checking your exposure now. HEROIC's free breach scanner checks your email address against more than 400 billion leaked records, including regional stealer logs like this one, so you can find out quickly if your credentials were exposed and secure your accounts before someone else does.