Check important accounts first, and search your inbox for genuine order, password and security messages. A sudden email flood can hide another incident. Do not click dozens of confirmation or unsubscribe links.
Why the flood happens
With ‘subscription bombing’, someone signs an address up to many services quickly. The confirmation emails may come from real systems even though you did not register. The noise can conceal a purchase or account change elsewhere. It does not automatically mean your mailbox itself was hacked.
Look for the possible hidden event
Open your bank, card and key shop accounts through their known apps or bookmarks. Check payments, orders, delivery addresses and security settings. Search your mailbox rather than deleting everything unread. Contact the real provider promptly if you find an unauthorised transaction.
Reduce the noise safely
Use your mail app's spam and filtering tools carefully. Clicking many unfamiliar confirmation or unsubscribe links can lead to unknown sites and does little to reveal the underlying issue. Ask your mail provider or workplace IT for help if the flood continues. If account access also looks suspicious, check passwords, sessions and forwarding rules.
Look for the incident the flood may be hiding before simply clearing the inbox.
Sources and further help
The linked information supports this guide. It does not imply that these organisations work with or endorse MailMigo.