I've just installed a fresh copy of v1.12 and am experiencing this same issue.
Email is piped in via Postfix transport. Each incoming email causes two "API Unexpected Data" events to appear in the log:
1. system_emails: Unexpected data received in API request
2. thread_entry_recipients: Unexpected data received in API request
Is there a method to debug the API request? I'm curious if this error is due to a bug in osTicket, or if the error is in how I've setup the Postfix transport. The flags to pipe
are DRhu. Is this correct?
PHP is v5.6.40-0+deb8u4
all PHP extensions listed at (Admin -> Dashboard -> Information) are checked/installed