Mail Access 1327 Mix: 1,167 Logins Could Unlock More Accounts

Mail Access 1327 Mix: How 1,167 Leaked Logins Can Unlock More Than Email

HEROIC analysts identified a combolist titled "MAIL ACCESS 1327 MIX DOMAIN VALID 100," uploaded to a Telegram channel and added to our breach intelligence database. The file contains 1,167 records of email addresses paired with plaintext passwords and the login URLs they work on. The credentials were leaked on 16 March 2026.

Why This Is Dangerous

Because this file is marked "valid," meaning the credentials have reportedly been checked and confirmed to work, an attacker who obtains it can log straight into email inboxes without any trial and error. From there, the risk chains outward: most people use their email account to receive password reset links for banking, shopping, and social media. Someone who takes over an email address on this list can use it to reset passwords on other accounts the victim never expected to be at risk.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated login URLs

Why This Matters

Email accounts are the hub that connects to almost everything else online. A leaked, working email and password pair can be used for credential stuffing against other services, but it can also be used directly to hijack the linked account and pivot into banking, shopping, or social media logins tied to the same address. That chain of access is what turns a small 1,167-record leak into a real identity theft or financial fraud risk for the people on this list.

How a Combolist Like This Gets Built

Combolists labeled "valid" or "domain valid" have typically been run through a checker tool that confirms which email and password pairs still log in successfully, then filtered to keep only the working ones. This makes smaller lists like this 1,167-record file more dangerous per record than larger, unverified dumps, since every entry has a higher chance of actually working.

Check If You Are Affected

Because this file targets working logins specifically, it is worth checking whether your email is part of it or any other leak in HEROIC's database of more than 400 billion breached records. Use HEROIC's free breach scanner to search your email and change any passwords that come back as compromised.