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KMailLinux vs ThunderbirdWindows

KMail als Linux-Alternative zu Thunderbird

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Unser Fazit

KMail can replace Thunderbird for most email‑centric workflows, especially if you already use KDE or prefer tight integration with the Kontact suite. It handles IMAP/POP3, multiple accounts, filtering and PIM features just as well, and adds native Akonadi support for contacts and calendar. Users who need built‑in chat, RSS reading, or extensive add‑on ecosystems may find Thunderbird more convenient. In short, KMail is a solid choice for Linux‑only users who want a cohesive KDE experience, but power users reliant on Thunderbird extensions or non‑email features should evaluate the gaps first.

Funktionsabdeckung78%
Lizenz
GPL-2.0-or-later
Preis
Kostenlos
Aktuelle Version
26.08.2
Bewertung
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Screenshot von KMail

Was gleich funktioniert

  • IMAP, POP3 and local mailbox support
  • Multiple accounts and identities
  • Message filtering and rule‑based automation
  • Calendar and contact integration

Was anders ist

  • No built‑in IRC/XMPP/Matrix chat client
  • No native RSS feed reader
  • Usenet/NNTP support is absent
  • Extension ecosystem is far smaller than Thunderbird's

Ihre Thunderbird-Dateien öffnen

KMail can import standard mbox files, which Thunderbird also uses for local folders. Exporting Thunderbird's .mbox archives and then importing them via KMail's import wizard works, but there is no direct support for Thunderbird's proprietary .sqlite profile data. Contacts can be exported from Thunderbird as vCard or CSV and imported into KAddressBook without issue.

Von Thunderbird zu KMail wechseln – Schritt für Schritt

  1. Export Thunderbird mail folders as mbox files (File → Export).
  2. Export contacts as vCard or CSV (Address Book → Export).
  3. Open KMail, run Settings → Configure KMail → Import → mbox, and point to the exported files.
  4. Import contacts via KAddressBook → File → Import → vCard/CSV.
  5. Configure your IMAP/POP3 accounts in KMail to match the previous setup.
  6. Test sending and receiving, then uninstall Thunderbird if satisfied.

Wichtige Funktionen von KMail

  • Unterstützt IMAP, POP3 und lokale Mailboxen
  • Integrierte Kalender- und Kontaktverwaltung über Akonadi
  • Eingebaute Virenprüfung und Spam-Filterung (SpamAssassin)
  • PIM-Integration mit KOrganizer und KAddressBook
  • Unterstützung mehrerer Konten und Identitäten
  • Nachrichtenfilterung und regelbasierte Automatisierung
  • Vorschau und Verwaltung von Anhängen
  • Integration mit dem KDE-Dateimanager (Dolphin)

KMail unter Linux installieren

Ubuntu / Mintsudo apt install kmail
Debiansudo apt install kmail
Fedorasudo dnf install kmail
Arch / Manjarosudo pacman -S kmail
openSUSEsudo zypper install kmail

Häufige Fragen

Can KMail read Thunderbird's saved search folders?

KMail does not import Thunderbird's virtual search folders; you need to recreate them using KMail's filter rules.

Is there a way to keep both clients synchronized?

Both use standard mail protocols, so you can point each at the same IMAP server, but they will not share local state like tags or read status.

Does KMail support Thunderbird's add‑ons?

No. KMail has its own plug‑in system, and Thunderbird extensions are not compatible.

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