mail-archiver

v2606.1 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 1mo Communication & Email

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

archive archiver backup docker imap mail

+1 more

migration

Affected surfaces

breaking_upgrade

ReleasePort's take

Moderate signal

editorial:auto 1mo

Version 2606.1 introduces attachment deduplication and CLI local‑file import while fixing bulk export header loss, but it also triggers a storage‑intensive migration of all existing attachments that requires pre‑upgrade backup.

Why it matters: The breaking change (ID 50820) temporarily raises storage usage; administrators must back up attachment data before upgrading to avoid capacity issues.

Summary

AI summary

Updates ✨ New Features, ⚙️ Improvements, and 🐛 Bug Fixes across a mixed release.

Changes in this release

Type	Severity	Summary	CVE
Breaking	High	Migrates all existing attachments, temporarily increasing storage requirements; backup required before upgrade Migrates all existing attachments, temporarily increasing storage requirements; backup required before upgrade Source: llm_adapter@2026-06-08 Confidence: high	—
Feature
Feature	Medium	Adds attachment deduplication to reduce storage for recurring attachments Adds attachment deduplication to reduce storage for recurring attachments Source: llm_adapter@2026-06-08 Confidence: high	—
Feature	Low	Adds local file import options via CLI Adds local file import options via CLI Source: llm_adapter@2026-06-08 Confidence: high	—
Feature	Low	Adds feature splash screen displaying release notes to administrators (disable via env var) Adds feature splash screen displaying release notes to administrators (disable via env var) Source: llm_adapter@2026-06-08 Confidence: high	—
Bugfix	Medium	Fixes header preservation issue during bulk export Fixes header preservation issue during bulk export Source: llm_adapter@2026-06-08 Confidence: high	—

Full changelog

✨ New Features

Attachment Deduplication to reduce the storage space needed for recurring attachments such as company logos in signatures (see documentation here)
Added Local File Import Options, see documentation here.
New Feature Splash Screen to display release notes to administrators after the update (can be disabled in the environment variables if unwanted, see setup documentation).

⚙️ Improvements

Added information about failed exports (see issue #430).

🐛 Bug Fixes

Fixed Header Preservation for bulk export.

⚠️ Important: Please create a backup before upgrading, as a migration of all existing attachments will be performed. Please note that storage requirements will temporarily increase during the migration process. For more information, see here.

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About mail-archiver

Mail-Archiver is a web application for archiving, searching, and exporting emails from multiple accounts. Featuring folder sync, attachment support, mailbox migration and a dashboard.

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