Dark Web Intel: Mail Acces 1604 Valid Mix 100 Leaks 1,555 Logins

HEROIC analysts tracked a stealer log file named "Mail Acces 1604 Valid Mix 100," uploaded to a Telegram channel in August 2025. The file contains 1,555 records described by its uploader as "valid," meaning the email addresses, plaintext passwords, and login URLs inside have reportedly been confirmed to still work.

Why This Is Dangerous

Most leaked credential lists include a mix of old and dead logins, but this one is being marketed specifically as a "valid mix," meaning the person behind it claims to have tested the accounts before sharing them. That makes the file more valuable to criminals and more dangerous to victims, since it points straight to working email logins rather than stale data.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the associated mail login pages

Why This Matters

Email accounts are often the master key to a person's entire digital life. Anyone with working access to an inbox can reset passwords on banking, shopping, and social media accounts, intercept two-factor codes, and impersonate the victim in messages to contacts. With 1,555 claimed-valid logins in this file, the potential for account takeover and downstream fraud is significant.

Dark Web Intel: How "Valid Mix" Stealer Logs Are Built and Sold

Files like this one start with infostealer malware that harvests saved browser passwords and autofill data from infected devices. Sellers on Telegram and dark web forums then often run automated checkers against the harvested logins to filter out dead accounts, packaging only the working ones into a "valid mix" to sell or share for reputation. That verification step is exactly what makes this particular log more dangerous than a raw, unchecked dump.

Check If You Are Affected

If your email address has ever been used on a compromised device or an infected app, it could be sitting in a log like this one right now. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, so you can find out fast and lock down your accounts before anyone else gets in.