Sending documents through a Peppol network using Oxalis AS4 6.7.0 suddenly started failing
### Understanding the Problem Sending documents through a Peppol network using Oxalis AS4 6.7.0 has suddenly stopped working. This could be due to various reasons such as configuration issues, network problems, or changes in the Peppol specifications. Our goal is to identify the root cause and provide steps to resolve the issue. ### Key Points to Consider 1. Oxalis AS4 is the open-source software implementation of OpenPeppol eDelivery Access Point specifications. 2. Version 6.7.0 is relatively recent, so compatibility with Peppol networks may have changed. 3. Configuration files and settings play a crucial role in successful document transmission. 4. Network connectivity and firewall settings could affect communication between systems. ### Step-by-Step Thought Process 1. Verify the current version of Oxalis AS4 being used. 2. Check the configuration files for any recent changes or misconfigurations. 3. Examine the network connectivity and firewall settings. 4. Test the connection with