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Nextcloud Mail

IMAP webmail client integrated into Nextcloud

Mail Servers ★ 1k stars Easy setup AGPL-3.0

Nextcloud Mail is the official mail app for Nextcloud that connects to existing IMAP and SMTP accounts inside the Nextcloud interface. It integrates with contacts, calendar, and files.

Official siteSource code

Key features

  • IMAP and SMTP support
  • Integrated with Nextcloud
  • Contacts and calendar links
  • Threaded conversations

Strengths

  • Released under the AGPL-3.0 license
  • Easy to set up — beginner-friendly
  • Active community (1k GitHub stars)
  • Written in JavaScript

Is Nextcloud Mail secure?

No known vulnerabilities affect Nextcloud Mail's latest release (v1.13.0). OSV.dev lists 17 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2025-66514, published 2025-12-05 (313 days ago), fixed in 5.5.3

Source: OSV.dev, checked 2026-10-14. How this is measured.

Nextcloud Mail replaces

Self-hosted Gmail alternatives

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SelfHostIndex: 71 · good

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