How do I get webhook notifications when an email fails?

To get webhook notifications when an email fails, you generally need to use your email provider’s delivery event webhooks or bounce/failure webhooks.

What to look for

Ask your provider for events like:

• bounce / hard bounce
• delivery failed
• blocked
• deferred / soft bounce
• complaint (sometimes relevant if delivery issues are caused by reputation)

Typical setup

1. Create a webhook endpoint on your server (for example: https://yourdomain.com/webhooks/email-events).
2. Configure your email service to send event callbacks to that URL.
3. Subscribe to failure-related events in the provider dashboard or API.
4. Verify the webhook signature so you trust incoming notifications.
5. Handle retries and deduplication, since providers may send the same event more than once.

Example event handling logic

When a webhook arrives:

• If event = bounce and reason = permanent/hard bounce → mark email address as undeliverable.
• If event = deferred → log it and possibly retry later.
• If event = blocked → inspect reputation, content, or recipient policy.

If you tell me your provider

If you’re using something like:

• SendGrid
• Mailgun
• Postmark
• Amazon SES
• Resend
• Mailjet

I can give you the exact steps and sample code for that provider.