Helpdesk Tax Online
Tickets Settings
Settings
Configure Postmark without touching PHP files.
Postmark API Server Token
From your Postmark server page (“Server API token”).
From Email (as seen by customers)
Must use a verified Sender Signature or domain in Postmark.
Message Stream (Transactional)
Stream ID from your Default Transactional Stream (often outbound).
Inbound email address (Postmark Inbound)
Copy this from your Default Inbound Stream → Email address. Replies will go to thataddress+TICKETID@... so we can read MailboxHash.