What should I check if ticket notifications do not arrive?

Review the sender, notification recipient, configured WordPress or direct-provider transport, and the plugin’s email-delivery records. Supported direct-provider options include SendGrid, Mailgun, and Postmark; they require your own account and configuration.

A provider accepting a message does not guarantee inbox delivery. Check spam filtering and provider delivery events, then use a controlled test after confirming the intended recipients. Never publish SMTP passwords or provider keys in a ticket or public article.