Inside the MAIL ACCESS JAPON MIX Combolist: 303 Passwords Exposed

HEROIC analysts identified a combolist titled "MAIL ACCESS JAPON MIX VALID 100" uploaded to Telegram on August 1, 2026. The file contains 303 records, each pairing an email address with a plaintext password and the URL the credentials were used on.

How a Combolist Like MAIL ACCESS JAPON MIX Gets Made

A combolist is essentially a curated cheat sheet for attackers: email addresses and passwords lined up together, often sorted or labeled by the uploader to advertise what's inside, in this case a batch marked as validated logins. The "VALID 100" label suggests the uploader tested the credentials before posting, which raises the odds that the logins in this file still work.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each login

Why This Matters

Even a smaller list like this one carries real risk for the 303 people whose credentials are included. Attackers don't need a massive breach to cause damage, a working email and password pair is enough to attempt credential stuffing across other sites, and if the password has been reused, to take over additional accounts tied to that person's identity.

Why Combolists Keep Showing Up on Telegram

Telegram has become a common distribution point for combolists because channels are easy to set up, and files can be shared quickly to a wide audience with little moderation. Uploaders often label their files, as with MAIL ACCESS JAPON MIX VALID 100, to signal freshness or accuracy to buyers and other threat actors browsing the channel.

Check If You Are Affected

If you want to know whether your email address appears in this leak or any other, HEROIC's free breach scanner checks against a database of more than 400 billion compromised records. Run a scan and update any password you've reused elsewhere.