---
id: TASK-6
title: Fix rinbox.online/rmail.online tunnel routing (502/404)
status: Done
assignee: []
created_date: '2026-02-25 09:03'
labels:
  - infrastructure
  - bugfix
dependencies: []
priority: high
---

## Description

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rinbox.online returned 502 and rmail.online returned 404 due to Next.js HOSTNAME binding and missing Traefik rules. Fixed by: (1) adding export HOSTNAME=0.0.0.0 in entrypoint.sh to override Docker's container ID injection, (2) adding rmail.online and www.rmail.online to Traefik router Host rules in docker-compose.yml, (3) fixing Netcup remote to fetch from rinbox-online repo instead of old rmail-online.
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## Final Summary

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Fixed two routing issues: rinbox.online 502 (Next.js binding to wrong network interface — solved with HOSTNAME=0.0.0.0 in entrypoint.sh) and rmail.online 404 (missing Traefik Host rule). All 25 r* domains now returning HTTP 200.
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