Mailbox
Inbox simulator. Authentication results are seeded, not real. Intake runs with the extractor mode from Settings.
Threads
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Compose as the vendor (or an attacker)
Sends to AP. The sender preset controls whether the domain matches the vendor of record.
Upload a real email (.eml)
Headers are parsed as-is: From, Reply-To, Authentication-Results (SPF/DKIM/DMARC), threading, body and attachments. Missing authentication headers are shown as missing, never assumed to pass.