# Historical log visualization explained — website update notes

Published: 2026-09-19

This update adds descriptions and guidance to the LogGraphic website. Historical log visualization is an existing application feature. These website changes do not introduce a new app version; the current published app release is 1.17.0.

## Explaining historical mail log analysis

- Updated the homepage to highlight visualization of historical Postfix logs saved on your PC.
- Added a dedicated section about analyzing saved historical mail logs.
- Explained loading saved logs, reviewing successful, failed and deferred deliveries, and inspecting sender and recipient addresses and destination servers.
- Described timeline replay with pause, fast-forward and seek controls.

## Q&A, translations and search metadata

- Added the question: Can I visualize historical log files?
- Clarified that file analysis runs in the desktop application and does not require an SSH connection to the server.
- Added equivalent content to the Japanese and English pages.
- Updated page descriptions, feature-list structured data and FAQ structured data to match the visible content.

## Using the feature

Open a saved Postfix plain-text log in the LogGraphic desktop app, or drag and drop the file. Set the log start date and time to display and aggregate events from that point onward.

No app reinstallation is needed for this website update.