Use multi-factor authentication (MFA) on all critical accounts to prevent unauthorized access even if your password is stolen.
Often used by leakers to claim the credentials are valid, fresh, or have a high "hit rate" for successful logins. HQ #6MAIL ACCESS& EDU Access D90K #6DDARK .txt
Indicates the list contains credentials specifically for logging into email accounts (IMAP/POP3/SMTP). in this case
If you have encountered this file name or are mentioned within such a leak, it indicates that your credentials have been compromised through a third-party breach. HQ #6MAIL ACCESS& EDU Access D90K #6DDARK .txt
Likely refers to the quantity of entries in the file, in this case, 90,000 lines of data.
Immediately update passwords for sensitive accounts, especially those that share a password with the leaked email address.