This article explains why an email that was accepted by the receiving mail server may not appear in the recipient's inbox, spam folder, or any other visible folder. It covers the most common causes — including mailbox filtering rules, automatic deletion, email forwarding, compromised mailboxes, and quarantine by business email security systems — and provides a step-by-step troubleshooting process for senders and recipients. The guidance applies to email marketers, deliverability teams, IT administrators, and anyone investigating a missing email after delivery logs confirm acceptance.

Source link