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DSDillon Business Intelligence · Diagnose a problem or find the relevant answer.

Email Routing Diagnostic

Why can the business send email but not receive it?

Outbound and inbound email use different paths. Successful sending does not prove that inbound DNS, mail routing, mailbox delivery, filtering or storage is correct. Diagnosis should trace the inbound path independently.

Signals worth investigating

  • Outbound messages arrive but replies never reach the mailbox
  • MX records point somewhere unexpected
  • Messages reach server logs but not the user mailbox
  • Only some recipient aliases fail
  • Mailbox quotas, filters or routing rules have not been checked

A better diagnostic sequence

  1. Verify the domain’s current MX destination
  2. Confirm the receiving server accepts mail for the domain
  3. Trace a controlled inbound message through server logs
  4. Check aliases, filters, quotas and mailbox delivery
  5. Verify the client is reading the correct mailbox and folders
Use the free diagnostic: Check Digital Readiness →Diagnose business email problems →

DSDillon Commercial Intelligence Advisory. This page provides a diagnostic framework, not a guarantee of rankings, leads, revenue or email placement.