Look for hidden forwarding and filtering rules after you regain access. This guide starts with actions that are low-risk, reversible where possible, and useful even when the exact cause is still uncertain. If there is an immediate financial, workplace, safety, or legal concern, use the responsible provider or local authority’s current process.
First ten minutes
- 01Pause before deleting or resetting
A rushed clean-up can remove the detail that makes recovery easier.
- 02Record the time, what changed, and the account or device involved
A short note is often more useful than a perfect reconstruction later.
- 03Use a trusted route to the relevant provider or team owner
Open saved bookmarks, device settings, or official support pages rather than links from an alert.
What to preserve
Keep the message, notice, filename, time, affected address or device name, and screenshots of unusual settings if doing so is safe. Do not send passwords, recovery codes, private keys, or unredacted identity documents to an unverified contact. A record supports a provider or team that needs to understand what happened.
Escalate when
Escalate when access cannot be recovered through an official route, a payment method or sensitive data may be involved, the event affects a workplace, or you are being pressured to act quickly. The appropriate destination might be an account provider, bank, employer, insurer, qualified incident responder, or public reporting route in your jurisdiction.
Recovery path
After containment, review recovery options, active sessions, forwarding rules, software updates, backups, and credentials reused elsewhere. Make one change at a time when you can, then write down what was changed. That record helps you avoid repeating work and gives a small team a usable handover.
Forwarding rules are the quietest way an intruder keeps reading a business mailbox. The same reasoning appears in protecting business email while a funding application is open.
An unexpected forwarding rule is often the first sign that someone else has access to a mailbox. After you remove the rule and secure the account, the same question tends to surface for anyone running a small company: what happens to the money side when a founder account is compromised or when the business itself needs outside capital. That is a separate problem with its own vocabulary, and it is covered in the site's page on early stage startup funding, which walks through debt versus equity, SAFEs and priced rounds, SBA, SBIC, SBIR and STTR programs, and the preparation each path requires.
Related dispatches
Password manager basics · MFA methods compared · Cybersecurity incident first steps · How Security, Applied works
