Echomail

OxideBBS parses and composes common FTN echomail control lines through oxidebbs-ftn.

Supported control lines include:

• AREA
• MSGID
• REPLY
• INTL
• FMPT
• TOPT
• FLAGS
• SEEN-BY
• PATH
• Via
• tear lines
• origin lines

The parser is tolerant: unknown KEY: value control lines are preserved as unknown kludges instead of causing an import failure. The composer is stricter and emits canonical control-line prefixes for known variants.

The runtime tosser and scanner build on these primitives. net toss stores imported echomail metadata, SEEN-BY/PATH rows, duplicate-log decisions, packet state, and local message rows in DecentDB. net scan exports subscribed local messages into outbound packets, avoids re-exporting the same local message to the same link, and bundles ready packet files for ZIP-compression links.

Duplicate keys follow ADR 0023: MSGID is hashed with SHA-256 as the primary key within the network and echo area, while MSGID-less messages use a fallback hash over network, area, origin, timestamp bucket, subject, and normalized body hash with a five-minute clock-skew candidate window.