How do I find failed email requests?

It depends on what system you’re using, but in most email platforms you can find failed email requests by checking one of these places:

1. Email logs / delivery logs

Look for:

• Failed
• Bounced
• Rejected
• Deferred
• Spam blocked
• Invalid recipient

2. Admin console / dashboard

If you’re using a provider like:

• Microsoft 365 / Exchange
• Google Workspace / Gmail
• SendGrid
• Mailgun
• Amazon SES
• Postfix / Sendmail

there’s usually a message trace, activity log, or transaction log showing delivery attempts and errors.

3. Bounce notifications

Failed sends often generate:

• NDRs / bounce-back emails
• Delivery status notifications
• SMTP error codes like 550, 554, 421, etc.

4. Application logs

If your app sends email via SMTP or an API, check:

• your app logs
• web server logs
• mail provider API logs
• error stack traces

5. Search by status or error code

If you have a list of email requests in a database, filter for:

• status = failed
• status = bounced
• error IS NOT NULL
• attempt_count > 0 AND delivered_at IS NULL

If you want, I can give you the exact steps for a specific service (like Microsoft 365, Gmail, SendGrid, SES, or a database/app log).