1. Confirm the booking contains the correct customer email address.
2. Check that the relevant email or automation is enabled.
3. Verify the sender name, sender address, and reply-to address.
4. Send a controlled test to an address you own.
5. Check spam, quarantine, SMTP logs, and automation run history.
6. Confirm your domain’s SPF, DKIM, and DMARC configuration with your email provider.

What to send support

Include the approximate time, message type, booking ID, recipient domain (not the full address if unnecessary), expected result, actual result, and any non-sensitive log error. Never include mailbox passwords, SMTP passwords, API keys, or customer payment details.