The 3700 Mix Mailpass Leak Put 3,561 Email and Password Pairs Online

HEROIC analysts reviewed this combolist after a Telegram user uploaded it in late June 2026 under the label 3700 Mix Mailpass. The filename suggests around 3,700 records, but our analysts confirmed the actual file contains 3,561 records pairing email addresses with plaintext passwords and the URLs those logins were used on. The mailpass label and mix of sources indicate this is a general-purpose credential list rather than one tied to a single company or platform. Why This Leak Is Dangerous: Every password in this file is stored in plain, readable text, which means anyone who downloads it can attempt to log in immediately, no cracking required. Because the list mixes credentials from multiple unrelated sources, it functions as a ready-made toolkit for testing stolen logins across many different websites at once. What Was Exposed: - Email addresses - Plaintext passwords - URLs tied to each set of credentials Why This Matters: If your email and password appear in this file, an attacker already has a working login for at least one of your accounts. If that password was reused elsewhere, credential stuffing attacks can extend the damage across your other accounts, leading to account takeover, identity theft, or financial fraud on services that have nothing to do with the original leak. How Mix Mailpass Combolists Get Built: A mailpass combolist is compiled by combining email and password pairs from multiple sources, such as older breaches, phishing pages, and malware-infected devices, into one file. The mix label signals that the uploader pulled from several unrelated leaks rather than a single source, which is common practice on Telegram, where combolists are often assembled quickly and shared for free or low cost. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including combolists like this 3,561-record file. Run a free scan to see if your credentials appear in this leak or any other breach in HEROIC's database.