If a recovery-contact mailbox was hacked, treat every appeal letter in it during the intrusion as exposed. A recovery-contact mailbox is the email address that receives password resets and appeal replies for linked accounts. To assess exposure, list what appeal mail was in the box, who sent it, and whether hidden forwarding kept a copy. Then lock linked accounts and notify people whose documents were inside.
Table of Contents
- What counts as exposed appeal mail?
- Which linked accounts need review?
- Did mail leave through hidden rules?
- When and what could the intruder touch?
- What to preserve, report, and tell senders?
What counts as exposed appeal mail?
Build an inventory of letters, attachments, and replies present during the access window. Follow the same inventory-plus-impact model CISA required for compromised federal Microsoft accounts in April 2024: identify the content, then judge the harm if it left the mailbox.
Treat any appeal present, searchable, or forwarded during the window as exposed. Normal logs do not show a read-only view, so lack of a sent-mail trace does not clear a message.
Which linked accounts need review?
The Federal Trade Commission states an attacker with mailbox control can reset passwords for banking, social, shopping, and cloud accounts tied to that email, so exposure review must cover every recovery use recover a hacked email or social account. List each account that uses the hacked address for login, recovery, alerts, or billing. Examples include bank password resets, cloud storage shares with appeal PDFs, shopping order records with home addresses, and social accounts used to message applicants.
Did mail leave through hidden rules?
Check for silent persistence before changing the password. Google Gmail Help advises users to inspect forwarding addresses, filters, delegates, connected apps, and recovery phone and email because intruders often add auto-forward or auto-delete rules check Gmail for suspicious activity.
Microsoft gives the same warning for work mailboxes: an intruder can auto-forward mail outside the organization to steal its contents. Look for the same signs in any provider:.
- external forwarding addresses and inbox rules
- filters that skip the inbox, mark read, or delete appeal subjects
- delegates, shared access, connected apps, and changed recovery contacts
When and what could the intruder touch?
Reconstruct the compromise window and correspondent list from account traces. Microsoft Support points to recent sign-in activity, sent items, trash and deleted items, and last-activity details to show when, where, and what an intruder could read or send help protect your Outlook account.
Save sign-in times, IP locations, and device details. Export sent mail, drafts, trash, and search history for appeal names, case numbers, and attachments opened during that period.
What to preserve, report, and tell senders?
Keep copies of headers, rules, sign-in logs, and forwarded samples before cleanup. Report the hack through the mail provider recovery page, report fraud to the FTC at ReportFraud.ftc.gov and identity misuse at IdentityTheft.gov, and file a complaint with the FBI Internet Crime Complaint Center at ic3.gov.
If appeals held Social Security numbers, financial records, medical notes, or ID copies, warn the senders and subjects. The Federal Trade Commission's IdentityTheft.gov gives a tailored recovery plan and official Identity Theft Report for that identity-theft risk.
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