11.5. Response Specification

The filter program responds to the server by writing to the STDOUT file descriptor. The format of the response is <responsecode> <messageid>. The only valid response codes are 335 (accepted) and "435" (rejected).

+------------------------+ IMPORTANT NOTE: The server requires that the message-id portion of the response EXACTLY match the message-id in the request. Any deviation from this requirement will result in "out-of-sync" errors from the server, causing the filter program to be shut down. +------------------------+