What these signs usually mean
A compromised mailbox often acts as the control room for password resets, fraud notifications and identity verification. Even one suspicious rule or unknown device can mean the attacker still has persistent access.
Mailbox compromise guide
Many victims do not realize their mailbox is compromised until the fallout reaches other accounts, payments or identity recovery. This checklist helps confirm the warning signs before the damage spreads.
Use it when your inbox starts behaving strangely, sign-in history looks wrong or password resets and fraud notices appear without a clear explanation.
A compromised mailbox often acts as the control room for password resets, fraud notifications and identity verification. Even one suspicious rule or unknown device can mean the attacker still has persistent access.
Start with the mailbox password, recovery settings, MFA methods, active sessions and forwarding rules. Then move into linked banking, social, shopping and work accounts that depend on the same inbox.