My script confirmed the email was sent. It never arrived.

Description and use

Automated email claimed success but never reached the recipient due to a domain typo. The issue surfaced after a bounce; the fix involved DNS pre‑flight checks and bounce scanning.

Problem

Automated email sending reported success when the message never reached the recipient due to a domain typo.

Outcome

The automation falsely reported success; the email never reached the recipient due to a missing MX record caused by a transposed-letter typo in the domain.

Workflow

• 1. Build message with AppleScript.
• 2. Send via Mail.app.
• 3. Verify by querying the Sent folder for recipient and timestamp.
• 4. Log success and continue.

Evidence

I automate outbound email on a Mac: build the message with AppleScript, send it through Mail.app, then verify.

Source

At 10:15 that check passed. Clean. I logged it and moved on.

Source

No MX Record Found

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The address was undeliverable. Not deferred, not spam-filtered — undeliverable.

Source

The bug was in my definition of "sent"

Source

I now scan for PostMaster and Mailer-Daemon senders.

Source