Version 1.18.3

Release Date: August 20, 2026 Release Type: Stable

AS2 configurable endpoint and optional authentication across all components, OFTP2 EERP and listener fixes, and flow-simulation hardening.

AS2 Start connector — configurable listen port/path and optional inbound authentication: The AS2 Start connector now resolves its listen port and path through the central endpoint configuration instead of fixed defaults, aligning it with the other inbound connectors. A new as2AuthenticationOptional option lets you accept AS2 messages from partners that do not send HTTP authentication, while keeping authentication enforced everywhere else.

Flow simulation is now reliable under concurrent runs: The simulation engine was hardened against a series of concurrency defects: runs could hang waiting on inputs that never arrived, results could be frozen before the flow actually finished, and payload previews could show internal object identifiers or bodies shared between runs. Simulations now wait on the run's real terminal state and snapshot payloads safely, so mock responses and step outputs are correct and stable.
OFTP2 delivery receipts (EERP) no longer lost when the partner offers its own files: After MIP delivered a file, some partners would first offer their own queued files before releasing the delivery receipt; MIP had no answer for that offer, so the session stalled and the transfer looked like a silent disconnect even though the file had arrived. MIP now declines such offers with a retry-later response (SFNA reason 14), keeping the partner's files queued and letting the EERP receipt come through so the transfer completes.
OFTP2 listener address resolved from the endpoint configuration: The OFTP2 connector now derives its advertised listener origin from the central endpoint catalog instead of a separately maintained value, so the address shown and used for OFTP2 always matches the configured endpoints.

Optional partner authentication for AS2 receive connectors: AS2 start connectors gain an "authentication optional" setting that lets you accept messages without the AS2-To/AS2-From partner-ID check when needed. Inbound AS2 connector addresses shown in the UI are now resolved consistently through the endpoint catalog.

Flow simulation returns proper mock responses: The simulation run proxy now explicitly requests JSON from the backend, so simulation results and mock responses render correctly instead of coming back in an unexpected format.

AS2 receive without authentication: The AS2 start connector gains a "No Authentication" option, so inbound AS2 endpoints can be configured to accept messages from partners without requiring authentication credentials.

Flow simulation panel input and mock validation: The simulation panel now flags duplicate header/property names instead of silently dropping rows, validates mock definitions (duplicate names, HTTP status range, malformed JSON bodies), and enforces one selected mock per node. The mock node dropdown only offers connector types that can actually be intercepted, and deleting the partial-flow stop node cleanly falls back to running the entire flow.

1.18.3 is a stable release. Previous: 1.18.2