i18n/i18n/ja/email-clients.md

title, icon, description, cover

title	icon	description	cover
メールクライアント	material/email-open	これらの電子メールクライアントはプライバシーを尊重し、OpenPGP電子メール暗号化をサポートしています。	email-clients.webp

Our recommendation list contains email clients that support both OpenPGP and strong authentication such as Open Authorization (OAuth). OAuth allows you to use Multi-Factor Authentication and prevent account theft.

??? warning "Email does not provide forward secrecy"

When using end-to-end encryption (E2EE) technology like OpenPGP, email will still have [some metadata](email.md#email-metadata-overview) that is not encrypted in the header of the email.

OpenPGP also does not support [forward secrecy](https://en.wikipedia.org/wiki/Forward_secrecy), which means if either your or the recipient's private key is ever stolen, all previous messages encrypted with it will be exposed: [How do I protect my private keys?](basics/email-security.md) Consider using a medium that provides forward secrecy:

[Real-time Communication](real-time-communication.md){ .md-button }

クロスプラットフォーム

Thunderbird

!!! recommendation

![Thunderbird logo](assets/img/email-clients/thunderbird.svg){ align=right }

**Thunderbird** is a free, open-source, cross-platform email, newsgroup, news feed, and chat (XMPP, IRC, Twitter) client developed by the Thunderbird community, and previously by the Mozilla Foundation.

[:octicons-home-16: ホームページ](https://www.thunderbird.net){ .md-button .md-button--primary }
[:octicons-eye-16:](https://www.mozilla.org/privacy/thunderbird){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://support.mozilla.org/products/thunderbird){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://hg.mozilla.org/comm-central){ .card-link title="ソースコード" }

??? ダウンロード

    - [:simple-windows11: Windows](https://www.thunderbird.net)
    - [:simple-apple: macOS](https://www.thunderbird.net)
    - [:simple-linux: Linux](https://www.thunderbird.net)
    - [:simple-flathub: Flathub](https://flathub.org/apps/details/org.mozilla.Thunderbird)

推奨する設定

We recommend changing some of these settings to make Thunderbird a little more private.

These options can be found in :material-menu: → Settings → Privacy & Security.

Web Content

• Uncheck Remember websites and links I've visited
• Uncheck Accept cookies from sites

テレメトリー

• Uncheck Allow Thunderbird to send technical and interaction data to Mozilla

Thunderbird-user.js (advanced)

thunderbird-user.js, is a set of configurations options that aims to disable as many of the web-browsing features within Thunderbird as possible in order to reduce surface area and maintain privacy. Some of the changes are backported from the Arkenfox project.

Platform Specific

Apple Mail（macOS）

!!! recommendation

![Apple Mail logo](assets/img/email-clients/applemail.png){ align=right }

**Apple Mail** is included in macOS and can be extended to have OpenPGP support with [GPG Suite](encryption.md#gpg-suite), which adds the ability to send PGP-encrypted email.

[:octicons-home-16: ホームページ](https://support.apple.com/guide/mail/welcome/mac){ .md-button .md-button--primary }
[:octicons-eye-16:](https://www.apple.com/legal/privacy/en-ww/){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://support.apple.com/mail){ .card-link title=ドキュメンテーション}

Apple Mail has the ability to load remote content in the background or block it entirely and hide your IP address from senders on macOS and iOS.

Canary Mail (iOS)

!!! recommendation

![Canary Mail logo](assets/img/email-clients/canarymail.svg){ align=right }

**Canary Mail** is a paid email client designed to make end-to-end encryption seamless with security features such as a biometric app lock.

[:octicons-home-16: ホームページ](https://canarymail.io){ .md-button .md-button--primary }
[:octicons-eye-16:](https://canarymail.io/privacy.html){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://canarymail.zendesk.com/){ .card-link title=ドキュメンテーション}

??? ダウンロード

    - [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=io.canarymail.android)
    - [:simple-appstore: App Store](https://apps.apple.com/app/id1236045954)
    - [:simple-windows11: Windows](https://canarymail.io/downloads.html)

!!! 警告

Canary Mail only recently released a Windows and Android client, though we don't believe they are as stable as their iOS and Mac counterparts.

Canary Mailのソースコードは公開されていません。 We recommend it due to the few choices there are for email clients on iOS that support PGP E2EE.

FairEmail（Android）

!!! recommendation

![FairEmail logo](assets/img/email-clients/fairemail.svg){ align=right }

**FairEmail** is a minimal, open-source email app, using open standards (IMAP, SMTP, OpenPGP) with a low data and battery usage.

[:octicons-home-16: Homepage](https://email.faircode.eu){ .md-button .md-button--primary }
[:octicons-eye-16:](https://github.com/M66B/FairEmail/blob/master/PRIVACY.md){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://github.com/M66B/FairEmail/blob/master/FAQ.md){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://github.com/M66B/FairEmail){ .card-link title="ソースコード" }
[:octicons-heart-16:](https://email.faircode.eu/donate/){ .card-link title=貢献 }

??? ダウンロード

    - [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=eu.faircode.email)
    - [:simple-github: GitHub](https://github.com/M66B/FairEmail/releases)

GNOME Evolution（GNOME）

!!! recommendation

![Evolution logo](assets/img/email-clients/evolution.svg){ align=right }

**Evolution** is a personal information management application that provides integrated mail, calendaring and address book functionality. Evolution has extensive [documentation](https://help.gnome.org/users/evolution/stable/) to help you get started.

[:octicons-home-16: Homepage](https://wiki.gnome.org/Apps/Evolution){ .md-button .md-button--primary }
[:octicons-eye-16:](https://wiki.gnome.org/Apps/Evolution/PrivacyPolicy){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://help.gnome.org/users/evolution/stable/){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://gitlab.gnome.org/GNOME/evolution/){ .card-link title="ソースコード" }
[:octicons-heart-16:](https://www.gnome.org/donate/){ .card-link title=貢献 }

??? ダウンロード

    - [:simple-flathub: Flathub](https://flathub.org/apps/details/org.gnome.Evolution)

K-9 Mail (Android)

!!! recommendation

![K-9 Mail logo](assets/img/email-clients/k9mail.svg){ align=right }

**K-9 Mail** is an independent mail application that supports both POP3 and IMAP mailboxes, but only supports push mail for IMAP.

In the future, K-9 Mail will be the [officially branded](https://k9mail.app/2022/06/13/K-9-Mail-and-Thunderbird.html) Thunderbird client for Android.

[:octicons-home-16: Homepage](https://k9mail.app){ .md-button .md-button--primary }
[:octicons-eye-16:](https://k9mail.app/privacy){ .card-link title="Privacy Policy" }
[:octicons-info-16:](https://docs.k9mail.app/){ .card-link title=Documentation}
[:octicons-code-16:](https://github.com/thundernest/k-9){ .card-link title="Source Code" }
[:octicons-heart-16:](https://k9mail.app/contribute){ .card-link title=Contribute }

??? downloads

    - [:simple-googleplay: Google Play](https://play.google.com/store/apps/details?id=com.fsck.k9)
    - [:simple-github: GitHub](https://github.com/thundernest/k-9/releases)

!!! 警告

When replying to someone on a mailing list the "reply" option may also include the mailing list. For more information see [thundernest/k-9 #3738](https://github.com/thundernest/k-9/issues/3738).

Kontact（KDE）

!!! recommendation

![Kontact logo](assets/img/email-clients/kontact.svg){ align=right }

**Kontact** is a personal information manager (PIM) application from the [KDE](https://kde.org) project. It provides a mail client, address book, organizer and RSS client.

[:octicons-home-16: ホームページ](https://kontact.kde.org){ .md-button .md-button--primary }
[:octicons-eye-16:](https://kde.org/privacypolicy-apps){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://kontact.kde.org/users/){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://invent.kde.org/pim/kmail){ .card-link title="ソースコード" }
[:octicons-heart-16:](https://kde.org/community/donations/){ .card-link title=貢献 }

??? ダウンロード

    - [:simple-linux: Linux](https://kontact.kde.org/download)
    - [:simple-flathub: Flathub](https://flathub.org/apps/details/org.kde.kontact)

Mailvelope (Browser)

!!! recommendation

![Mailvelope logo](assets/img/email-clients/mailvelope.svg){ align=right }

**Mailvelope** is a browser extension that enables the exchange of encrypted emails following the OpenPGP encryption standard.

[:octicons-home-16: ホームページ](https://www.mailvelope.com){ .md-button .md-button--primary }
[:octicons-eye-16:](https://www.mailvelope.com/en/privacy-policy){ .card-link title="プライバシーポリシー" }
[:octicons-info-16:](https://mailvelope.com/faq){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://github.com/mailvelope/mailvelope){ .card-link title="ソースコード" }

??? ダウンロード

    - [:simple-firefoxbrowser: Firefox](https://addons.mozilla.org/firefox/addon/mailvelope)
    - [:simple-googlechrome: Chrome](https://chrome.google.com/webstore/detail/mailvelope/kajibbejlbohfaggdiogboambcijhkke)
    - [:simple-microsoftedge: Edge](https://microsoftedge.microsoft.com/addons/detail/mailvelope/dgcbddhdhjppfdfjpciagmmibadmoapc)

NeoMutt (CLI)

!!! recommendation

![NeoMutt logo](assets/img/email-clients/mutt.svg){ align=right }

**NeoMutt** is an open-source command line mail reader (or MUA) for Linux and BSD. It's a fork of [Mutt](https://en.wikipedia.org/wiki/Mutt_(email_client)) with added features.

NeoMutt is a text-based client that has a steep learning curve. It is however, very customizable.

[:octicons-home-16: ホームページ](https://neomutt.org){ .md-button .md-button--primary }
[:octicons-info-16:](https://neomutt.org/guide/){ .card-link title=ドキュメンテーション}
[:octicons-code-16:](https://github.com/neomutt/neomutt){ .card-link title="ソースコード" }
[:octicons-heart-16:](https://www.paypal.com/paypalme/russon/){ .card-link title=貢献 }

??? ダウンロード

    - [:simple-apple: macOS](https://neomutt.org/distro)
    - [:simple-linux: Linux](https://neomutt.org/distro)

規準

**私たちは、推薦するどのプロジェクトとも提携していません。**客観的に推薦できるよう、標準となる基準に加えて、一連の明確な要件を定めています。 プロジェクトを利用する前に、このリストをよく理解し、ご自身で調査を行って、そのプロジェクトがあなたにとって適切な選択かどうかをご確認ください。

!!! example "この項目は最近作成されました"

私たちは、サイトの各項目に定義された基準を確立することに取り組んでいます。この基準は変更される可能性があります。 私たちの基準について疑問がある場合は、[フォーラムで質問](https://discuss.privacyguides.net/latest)してください。また、ここに記載されていない場合でも、私たちがプロジェクトを推奨する際に、そうした事柄を考慮しなかったと仮定するのはお止めください。 プロジェクトを推奨する際に考慮され、議論される要素は多くあり、そのすべてを文書化する作業は現在進行中です。

最低要件

• Apps developed for open-source operating systems must be open source.
• Must not collect telemetry, or have an easy way to disable all telemetry.
• Must support OpenPGP message encryption.

満たされることが望ましい基準

満たされることが望ましい基準には、このカテゴリーの完璧なプロジェクトに私たちが望むものを示しています。 私たちが推薦するプロジェクトは、この機能の一部または全部を含んでいないかもしれませんが、もし含んでいれば、このページで他のプロジェクトよりも上位にランクされるかもしれません。

• Should be open source.
• Should be cross-platform.
• Should not collect any telemetry by default.
• Should support OpenPGP natively, i.e. without extensions.
• Should support storing OpenPGP encrypted emails locally.