How to fix 'batch restore' mislabeled confirmation popup when batch deleting emails on the Archive page?

This is a confirmed UI labeling bug in application version 2604.2 (reported for Docker deployments). It triggers when you enable selection mode on the Archive page, select target emails, and click the "Deleted selected" button: the confirmation popup incorrectly shows "batch restore" text instead of the correct batch delete prompt. Official fix has been released in version 2605.2. Upgrade your Docker deployed instance to version 2605.2 or later to resolve the mislabeling issue.

Why does Russian text appear as HTML entities (e.g., П) on the Jobs page?

This bug was fixed in Mail-Archiver version 2604.2. For Docker installations, update by pulling the latest image and restarting the container: `docker compose pull && docker compose up -d`. Verify the version after update. If the problem persists, ensure your browser cache is cleared or try an incognito window.

How to fix Mailarchiver memory leak (RAM keeps growing) when syncing large Microsoft 365 mailboxes?

This memory leak was fixed in Mailarchiver version **2604.2**, which includes optimized memory management and garbage collection. Update your Docker container to version 2604.2 or later and restart the sync job. **Steps:** 1. Pull the latest image: `docker compose pull` (or update the image tag in Portainer to `2604.2`+). 2. Recreate the container: `docker compose up -d`. 3. Resume the mailbox sync — memory usage should now stay stable between batches (e.g., ~370–400 MB) instead of climbing until the host runs out of RAM. **To verify/diagnose if the issue persists:** - Enable Debug logging as described in the docs (doc/DockerComposeLogs.md → Log Level Configuration). - After each processed batch, memory usage is logged (e.g., `Memory usage after processing batch 1: 379.2 MB`). Watch whether it continuously increases. - If it still grows, share the anonymized console output and your batch size settings in the GitHub issue.

Why does MailArchiver Docker container fail with 'libgssapi_krb5.so.2' error on Synology NAS?

This error occurs in versions after 2512.1 because the Docker image is missing the Kerberos library libgssapi_krb5.so.2. To work around it, you can override the entrypoint to install the package at startup. For Debian/Ubuntu-based images, add to your docker-compose.yml: `command: sh -c "apt update && apt install -y libgssapi-krb5-2 && exec mailarchiver"`. For Alpine-based images, use: `command: sh -c "apk add --no-cache krb5-libs && exec mailarchiver"`. Alternatively, build a custom Dockerfile that adds `RUN apt install -y libgssapi-krb5-2` (or its Alpine equivalent). The official fix is tracked in GitHub issue #366; consider subscribing for updates.

mail-archiver

1.9k stars·System Optimization·SHA-256 checksum verified

Self-hosted email archiving system with automatic sync, advanced search, export to mbox/EML, multi-user support, and configurable retention policies.

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Self-hosted email archiving with sync, search, export, multi-user, and retention policies.

Core Features

Automatic sync from multiple IMAP or M365 accounts
Advanced search with filters (sender, subject, date, attachments)
Export to mbox or ZIP (EML) with batch selection
Multi-user system with granular account permissions
Retention policies: separate settings for server deletion and local archive

What It Can't Do

•The app does not provide HTTPS; use a reverse proxy (e.g., Nginx) for secure access. 2. Change the default admin password immediately after first login. 3. Use a strong database password, not the example 'masterkey'. 4. Set TimeZone__DisplayTimeZoneId correctly to avoid time display issues. 5. Regularly backup the PostgreSQL database for large archives.

Use Cases

Enterprise compliance archiving for regulatory requirements
Personal email backup from multiple accounts to a central server
Mail migration: import/export between old and new systems

Mail-Archiver is a comprehensive, self-hosted email archiving solution designed for individuals and organizations. It automatically syncs emails from multiple accounts via IMAP or Microsoft Graph API (M365), stores them in a PostgreSQL database, and provides a powerful web interface for searching, previewing, exporting, and managing archived messages. Key features include scheduled synchronization, attachment storage, advanced search with filters, mbox/EML export, multi-user access control with granular permissions, OIDC authentication integration, and configurable retention policies (both server-side and local archive). The application is built on ASP.NET Core 10 and can be easily deployed using Docker Compose. It is ideal for compliance, backup, or personal email management.

Getting Started

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Install the software

Double-click the downloaded installer and follow the prompts

Step 1: Install Docker and Docker Compose on your machine

Step 2: Create a docker-compose.yml file with database connection and admin credentials (see README)

Step 3: Run 'docker compose up -d' to start containers

Install Guide

Step 1: Install Docker and Docker Compose on your machine
Step 2: Create a docker-compose.yml file with database connection and admin credentials (see README)
Step 3: Run 'docker compose up -d' to start containers

File Integrity

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Open Source Transparency

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Environment Guide

Uninstall Info

Stop containers with 'docker compose down', then delete the postgres-data and data-protection-keys folders to completely remove all data.

No Extra Dependencies

Ready to use after download. No additional runtime required.

Project Info

LicenseMIT

Last Updated2026-10-15 09:32:13

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