/inbox is the endpoint for federation with ActivityPub, so definitely on the right track. Try increasing verbosity to get a full stack traceback to where in the code it’s bugging.
InboxTimeout means your server is taking too long to process API calls to /inbox, I’ve had them before too due to misconfiguration of the reverse proxy. Make sure you’re passing on the right headers, especially the IP headers so they aren’t rate limited and the Accept header so your server knows to send json when requested.
Troubleshooting federation gives many options for testing and checking your configuration, running through them might give your more insight.
What am I looking for in the logs though ? All I see is “InboxTimeout”…
/inbox is the endpoint for federation with ActivityPub, so definitely on the right track. Try increasing verbosity to get a full stack traceback to where in the code it’s bugging.
InboxTimeout means your server is taking too long to process API calls to /inbox, I’ve had them before too due to misconfiguration of the reverse proxy. Make sure you’re passing on the right headers, especially the IP headers so they aren’t rate limited and the Accept header so your server knows to send json when requested.
Troubleshooting federation gives many options for testing and checking your configuration, running through them might give your more insight.
So, here’s the full error :
lemmy-1 | 2025-07-14T00:34:32.098630Z DEBUG HTTP request{http.method=POST http.scheme="https" http.host=blog.kaki87.net http.target=/inbox otel.kind="server" request_id=a9c359f6-eb9d-4888-9ac2-55c1f5bb8e43}: actix_web::middleware::logger: Error in response: LemmyError { message: InboxTimeout, inner: InboxTimeout, context: SpanTrace [{ target: "lemmy_server::root_span_builder", name: "HTTP request", fields: "http.method=POST http.scheme=\"https\" http.host=blog.kaki87.net http.target=/inbox otel.kind=\"server\" request_id=a9c359f6-eb9d-4888-9ac2-55c1f5bb8e43", file: "src/root_span_builder.rs", line: 16 }] } lemmy-1 | 2025-07-14T00:34:32.098834Z WARN Error encountered while processing the incoming HTTP request: lemmy_server::root_span_builder: InboxTimeout: InboxTimeoutI’ve also been seeing this one :
lemmy-1 | 2025-07-14T00:41:00.407762Z DEBUG HTTP request{http.method=GET http.scheme="http" http.host=lemmy:8536 http.target=/api/v3/site otel.kind="server" request_id=9aab8319-3f3b-4f4e-8530-3b3633afe2f1}: actix_web::extract: Error for Option<T> extractor: IncorrectLogin: IncorrectLogin lemmy-1 | 2025-07-14T00:41:00.427630Z DEBUG HTTP request{http.method=GET http.scheme="http" http.host=lemmy:8536 http.target=/api/v3/post/list otel.kind="server" request_id=ef746ac7-b9a3-4615-bb37-4c12f0ed0827}: actix_web::extract: Error for Option<T> extractor: IncorrectLogin: IncorrectLoginAs for the reverse proxy, I’m using Caddy with the configuration provided here, and it’s supposed to pass those headers by default.
The suggested
curlrequests work.I wish there was a tool that could just tell what’s wrong, like https://federationtester.matrix.org/ for Matrix…