The 437K MailAccess Combo Leak Means Someone Could Read Your Email

HEROIC analysts found a combolist called "437K MailAccess Good Combo" uploaded to Telegram on June 24, 2026. The file contains 419,415 records made up of email addresses, plaintext passwords, and the URLs each login belongs to, all bundled into a single ready-to-use list.

Why This Is Dangerous

The name of this file tells you exactly what it is built for, gaining access to email accounts. If your inbox is one of the 419,415 entries here, an attacker does not need to guess your password, they already have it, along with the exact address it belongs to. Email access is especially valuable because it can be used to reset passwords on nearly every other account you own.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the accounts tied to each login

Why This Matters

Once someone has working access to an email account, they can use the "forgot password" option on banking sites, social media, and shopping accounts to take over one account after another. Combined with credential stuffing, where the same email and password combination is tested across other websites, a single exposed login here can snowball into full identity theft and financial fraud.

How This Combolist Was Assembled

Combolists like this are typically built from older breaches, stealer log outputs, or previously exposed databases, then sorted and reformatted into email:password pairs. A file specifically labeled for mail access, like this one, suggests it was filtered and verified to make sure the logins actually work, which is why it is being marketed as a "good combo." Once compiled, files like this circulate freely or are sold on Telegram channels, which is where HEROIC analysts located it.

Check If You Are Affected

Given the size and focus of this exposure, it is worth checking your email now rather than later. HEROIC's free breach scanner searches a database of more than 400 billion leaked records to show you whether your email and password appear in this combolist or any other exposure, so you can secure your accounts before someone else does.