Separate the failure types
Distinguish an invalid recipient, a rejection, a temporary deferral and a message delivered to spam.
Read this step →Email operations / a practical field guide
Diagnose delivery before sending more
A practical checklist for permission-based business email, authentication and useful delivery evidence.
Start with the decisions that matter
Check the actual sending path
List the services that send as your domain, including support, transactional and marketing tools.
Read this step →Send to people who expect the message
Use clear subscription expectations and a working opt-out for recurring marketing.
Read this step →A concrete example
A team’s CRM messages arrive but its newsletter fails. It checks the newsletter provider’s sending configuration separately, rather than assuming the CRM’s authentication proves everything is set up. It records one controlled test and the resulting headers before changing DNS.
Turn the guide into an action plan
Use the worksheet to record evidence, open questions and the next person responsible. Check only the items you have actually reviewed. Download a text copy or print your working notes.
Open the email worksheet →