The Mail Access 3491 Leak: 3,402 Verified Login Credentials Exposed

In September 2025, HEROIC analysts identified a combolist titled "Mail Access 3491 Hits Valid 100" uploaded to a Telegram channel by an anonymous user. The file contained 3,402 records pairing email addresses with plaintext passwords and associated URLs. Why the Mail Access 3491 Combolist Is Dangerous: the file's own name claims the credentials inside were tested and confirmed to work, meaning attackers do not need to guess which logins are still active before using them. Combined with plaintext storage, that makes the data immediately usable for mail account access. What Was Exposed: email addresses, plaintext passwords, and the URLs tied to each login. Why This Matters: with 3,402 credentials labeled as verified hits, anyone in this dataset who reused their password elsewhere faces a heightened risk of account takeover. Compromised email access in particular can let an attacker reset passwords for banking, shopping, or social media accounts tied to that inbox. How a Combolist Works: a combolist compiles email or username and password pairs, often gathered from older breaches, phishing pages, or malware infections, into a single file criminals run through automated tools to test logins across many websites. Files labeled as valid or hits, like this one, have typically already been checked once before being shared or sold. Check If You Are Affected: HEROIC's free breach scanner checks your email against more than 400 billion leaked records. Run a free check today to see if your credentials have surfaced in this or any other breach.