…ご利用にあたってのすべての質問について。Tutanota を利用するにあたっての予備知識は How-to にすべて記載してありますので御一読ください。
はい、Tutanota ウェブメールクライアントは、個人ユーザー向けの 1 GB のストレージ容量が永年無料で利用できます。 プレミアムオファー（独自のドメイン、追加のストレージ）はオプションで申し込むことができます。無料の保存容量はメールは実際は圧縮する（{blogCompressionLink}）ほど高くなります。
はい、すべての Tutanota クライアントは GPLv3 の下でオープンソースとして公開されています。GitHubリポジトリをご覧ください。私たちは、私たちにフィードバックを送るか、貢献するために、コードをレビューすることを歓迎します！
はい、Tutanota はすべてのメールシステムのためにもっぱら再生可能エネルギーに頼る グリーンメール サービスです。
Yes, Tutanota offers secure business email accounts with lots of whitelabel customizations. You can place the login for your employees directly on your website with a whitelabel domain. Tutanota also offers Secure Connect, an open source encrypted contact form so clients can get in touch with you confidentially directly on your website. Learn here how to use Tutanota in your organization or company with your custom email domain.
Here's a list of all whitelabel customizations for business use. Here's an instruction how to whitelabel Tutanota for your business, how to add the encrypted contact form Secure Connect to your website and more.
Secure Connect is an open source encrypted contact form which enables every visitor of your website to contact you confidentially. Check here how to book Secure Connect and how to send an encrypted message via Secure Connect.
Yes, Tutanota as an encrypted email service is perfectly suited for any business that would like to use a GDPR-compliant email service.
はい。ビジネスアカウントの登録後、 設定-> サブスクリプション で Tutanota においてデータ処理契約を見ることができます .
はい、暗号化されたカレンダーはTutanotaメールクライアントに統合されています。
Yes, Tutanota will include a whole set of collaboration options such as working together on task lists and documents in the future. You can already book this collaboration tool. Right now it is called 'sharing feature' as you can now share your encrypted calendars. This is the first step, more collaboration options will be added at no extra cost as Tutanota progresses.
We donate the business version of Tutanota to non-profit organizations (NPOs). Please find details on how non-profit organizations can secure their emails for free or with a discount.
If you can't login to your account, this has been caused by one of the following reasons:
Our secure password reset feature enables you to reset your account yourself. Please write down your recovery code somewhere safe.
No. When a password is used for authentication (login), it is not necessary that it is known to the server you want to authenticate with. The server only needs a fingerprint (hash) of your password. With Tutanota your hash for authentication is calculated by your browser and only the hash is being sent. Your password never travels the Internet in plain text and it is never seen by our server. As hashes are non-invertible, the server is unable to reconstruct your password from the hash. The server is not able to decrypt your message, but still able to log you in.
Recommended for further reading: Learn how Tutanota automates the encryption process while leaving you in full control of your encrypted data.
Tutanota uses a password strength indicator that takes several aspects of a password into consideration to make sure your chosen password is a perfect match for your secure email account. You can find additional tips on how to choose a strong password here.
Tutanota has no limitations in regard to the password length or used characters; all unicode characters are respected.
If you click on 'Logout', you log out. Please note: If you have previously saved the password, you are now logged out, but the password is still saved for automatic login. To 'unsave' the password, please log out. The login screen appears, click on 'More' and 'Delete credentials'.
Your private and your public keys are generated locally within your browser upon registration. Your private key is encrypted with your password. This way your login password receives the status of the private key. The key is encrypted so strong that only you can use the key for encrypting and decrypting data. This is why a strong password is essential. An automatic password check on the client makes sure that you use a strong password. Your password is never transmitted to the server in plain text. It is salted and then hashed with bcrypt locally on your device so that neither the server nor we have access to your password. With this innovative design you can access your encrypted inbox from any device (desktop, mobile) easily.
For the email encryption between users, Tutanota uses a standardized, hybrid method consisting of a symmetrical and an asymmetrical algorithm. Tutanota uses AES with a length of 128 bit and RSA with 2048 bit. Emails to external recipients are encrypted symmetrically with AES 128 bit.
The system automatically encrypts all emails stored in Tutanota. Emails between Tutanota users are automatically encrypted end-to-end, emails to external users can be secured with the help of a password. Here we explain the differences between a confidential (end-to-end encrypted) and a non-confidential email.
Independent of the end-to-end encryption, the transport between client and Tutanota servers is secured with SSL and DANE to maximize security. You can check here how to install the DANE browser add-ons.
私たちはログインしたときやメールを送るときにIPアドレスを記録しません。また、居場所が特定されないよう送受信されたメールのIPアドレスも削除されます。
Tutanotaが匿名メールサービスを提供する方法については、私たちのブログをご覧ください。登録に際しては、電話番号などの個人情報を提供する必要はありません。また、ビットコインでPremiumやProなどの有料プランの料金を支払うことができます。
Yes. You can view and remotely close active sessions under Settings -> Login.
Check our How-to to learn how to enable storing of closed sessions to monitor whether someone else has access to your account. To guarantee the users' privacy, we have implemented the feature as follows:
Free of charge accounts are deleted if they were not used for at least six months. Your deleted email address (also if it is an alias) will not be recycled for security reasons. There must be no possibility that someone else is able to register your previously used email address, and then, by accident, receive a confidential email that was meant for you.
Tutanota does not load images automatically when you open an email. When you load external images manually, please note that
Please read here how we make sure that you can use Tutanota as an anonymous email service. We plan to improve image loading in the future so that you can whitelist trusted senders; images in emails from these senders are then loaded by default.
Yes, Tutanota comes with full-text search of your encrypted mailbox. In the free version, search is limited to four weeks into the past due to heavy server load caused by the encrypted search feature. Learn here how you can improve your search results. The spam folder is excluded from search.
Search is executed locally via an encrypted search index to guarantee security and privacy of your data as well as your search queries. As the search index needs to be stored in your browser, it does not work in private mode/incognito mode. Read here how our innovative full-text search on encrypted data works.
You can request and discuss new features with us and other users in our Reddit community. You can check whether someone has already requested this feature and whether we have already added it to our Roadmap.
The language in Tutanota is taken automatically from your browser or system settings. Please change the language there. Alternatively, you can go to 'Settings' -> 'Appearance' to switch the displayed language for Tutanota.
We also invite you to join our translation project to improve Tutanota in your native language!
次のアプリストアからTutanotaをダウンロードできます。
直接アプリをダウンロードしてAndroid用APKをインストールする。 手動でダウンロードした場合、自動的にアップデートが通知されることはありません。 最新情報を最新の状態に保つには、あなたのRSSリーダーにTutanotaのブログを追加してください。: RSS Feed
WebViewはAndroidデバイス上のシステムアプリで、Tutanotaアプリ内にWebコンテンツを表示できます。 新しいバージョンでは、新しいテクノロジーを用いて、アプリをより小さく、より速く、より美しく、より信頼性の高いものにしています。 このアプリで問題が発生した場合は、WebViewを更新することで解決する可能性が高いです。
You can download the Tutanota desktop clients (beta) here:
Yes, you can add existing email addresses (e.g. Alice2, Alice3) as aliases to a Premium account (Alice1). Before you can add the aliases, you need to delete the other accounts (Alice2, Alice3) and specify the Premium account (Alice1) as the take over account upon deletion. We explain here how to take over the email addresses.
Please note: You are only transferring the email addresses. Emails and contacts stored in the deleted accounts (Alice2, Alice3) are being deleted. Please export important emails before deleting the accounts.
Tutanotaは、簡単に利用できます。当初から私たちはユーザビリティに焦点を当て、バック グラウンドでの暗号化プロセスを維持してきました。何かをインストールしたり、鍵の処理を心配したりする必要はありません。Tutanotaは、Gmailやその他のウェブメールサービスと同等のユーザビリティを提供しています。
Tutanotaはすぐに使い始められます。何か質問がある場合は、下記の詳しい使い方 を確認してください。
ここではTutanotaのすべての設定について説明しています。ユーザビリティについての以下のような質問にも答えています。
暗号化されたメールを送信する方法
非機密設定に切り替える方法
連絡先の並べ替え方法
フォルダーの追加/名前の変更/削除の方法
Premiumにアップグレードする方法
別名(エイリアス)を設定する方法
エイリアスからメールを送信する方法
Premiumユーザーのパスワードを管理する方法
自分のドメインでメールを送信する方法
暗号化された問い合わせフォームを自分のウェブサイトに追加する方法
Current encryption standards like PGP and S/MIME have several issues that we plan to address with Tutanota. These standards do not support forward secrecy and are not resistant to attacks from quantum computers.
In addition, it is important to us that the subject line in emails is also encrypted. That's why we have developed a solution that is also based on recognized algorithms (RSA and AES) and that automatically encrypts the subject, the content and the attachments. In the future, we plan to upgrade these algorithms to quantum-resistant ones that also support forward secrecy. You can find more information on why Tutanota does not use PGP here.
We also see the importance that Tutanota needs to be interoperable with other encryption solutions. We will develop an API so that Tutanota users can communicate with users of other secure services confidentially in the future.
Tutanota supports the current version of the following browsers:
Microsoft Edge (desktop)
Tutanota also works in Internet Explorer 11, but this browser is not officially supported.
Yes, you can always access the emails sent via Tutanota through the link from your latest notification email. Old notification links from the same sender are de-activated for security reasons. Your exchanged password, however, stays unchanged as long as the sender does not change it. If you have saved the password upon accessing your confidential emails in your browser, you do not have to re-enter it.
Yes. Tutanota uses a preshared password for sending an encrypted message to an external recipient, to someone who does not use Tutanota. Please check our how-to to learn how to send encrypted emails to external recipients.
Email aliases are additional email addresses that you can use with the same mailbox without having to switch accounts. Aliases are a Premium feature. If you upgrade to Premium (€1 per month), you can add up to 5 aliases.
Find out more about Tutanota aliases in our How-to. Learn here what the purpose of an email alias is and how aliases can increase your security.
いいえ、TutanotaはTutanotaドメインのプラスアドレス（xyz+username@tutanota.com）をサポートしていません。プラスアドレスを使用したい場合は、アリアスパッケージを買うか、Tutanotaをあなた自身のドメインおよびキャッチオールと共に使用することができます。
はい、Tutanota PremiumとProはあなた自身のメールドメインで使用できます。PremiumまたはProにアップグレードすると、お好きな数だけドメインを追加できます。
Tutanotaに独自のメールドメインを追加する方法、およびMXとSPFのエントリが正しく設定されていることを確認する方法および、 キャッチオール機能を有効/無効にする方法を参照してください。
Yes, Tutanota uses a spam filter to keep your mailbox free from spam. We are improving this filter continuously. Should you receive spam emails in your inbox, you can also configure your own spam rules here to blacklist or whitelist certain email addresses or domains.
In paid accounts, only admins can create spam rules that are being applied across all users.
Yes, Tutanota supports an unlimited number of inbox rules / filters for paid accounts. Check our how-to to see how to set up inbox rules.
Yes, Tutanota uses different variables to calculate email limits for individual accounts. This is necessary to protect our free and anonymous email service from spammers who try to abuse Tutanota. If spammers were able to abuse Tutanota, it would harm all Tutanota users - ie Tutanota domains could end up on email blacklists, which we have to prevent under all circumstances.
If you receive the following message in your Tutanota account "It looks like you exceeded the number of allowed emails. Please try again later.", the anti-spam protection method has stopped your account temporarily from sending new emails. Please wait a day or two to send new emails again.
If you need to send more emails immediately, please upgrade to our affordable Premium version (1 Euro per month) as limits for Premium or Pro users are much higher. Simply click on 'Premium' in your top menu bar of Tutanota.
Please note that Tutanota is not meant for sending out mass mailings such as newsletters. Please read our Terms & Conditions for details.
Yes, email addresses are automatically added to your encrypted Tutanota address book when sending an email unless you deactivate this feature. You'll find details here.
電子メール.複数選択を使用して、個々のメールまたはバッチエクスポートメールをエクスポートすることができます。.メールのインポートはまだできませんが、メールのインポートだけでなく、当社の新しい セキュアデスクトップクライアント でさらに簡単なエクスポート機能をサポートする計画です.
お問い合わせ: [vCard を介して連絡先をインポートすることができます] 。({howtocontactsLink}).
カレンダー：.icsを介してカレンダーをインポートおよびエクスポートできます。 データをインポートしたい、またはエクスポートしたいカレンダーの横にある３つドットの並んだのボタンをクリックするだけです。
はい、可能です。設定 -> メール で署名を変更できます。すべてのアカウントが署名を変更できます。私たちの無料で安全な電子メールサービスをサポートするために、あなたの署名に私たちのホームページへのリンクを記載していただけると幸いです。
Yes, Tutanota supports HTML editing options (embed images, add lists, bold, italics, underline, monospace, add hyperlinks, align the text left, center, right, justified, change text size, remove all formatting). These are explained in our how-to along with lots of information on email handling.
Yes, as a Premium user you can set up email notifications to any email address under 'Settings' - 'Email' - 'Notifications'. You will be informed about new emails once until you log in. Only if you have logged in to view this email, Tutanota will send another notification to keep notification emails to a minimum.
As a Free user, you can receive push notifications in the browser, the Android & iOS app as well as the desktop clients.
Yes, the Tutanota Transparency Report is updated every six months. You can check it here. It also includes a Warrant Canary.
Yes, you can downgrade back to free anytime. Before this, you need to disable all extra bookings (aliases, storage, additional users). You can keep your main Tutanota email address as a free account.
Check here how you can upgrade and downgrade.
Some accounts are automatically marked for approval upon sign-up to prevent abuse. This often affects IPs from VPN services or Tor as spammers try to bypass our anti-spam protection method by abusing these services. Please read here why the 48-hour wait is necessary to protect your privacy to the maximum with a truly anonymous email service.
During these 48 hours emails cannot be sent or received. Please do not share your new email address before the blocking has been lifted automatically.
悪用を防ぐため、新しく登録された電子メールアドレスが48時間ブロックされることがあります。 一時停止が自動的に解除されるまで、新しい電子メールアドレスを転送しないことが重要です。
一時停止中に電子メールアドレスを使用してサービスまたはニュースレターを登録すると、これらのサービスから登録の確認が送信されます。 この電子メールは、ブロッキングによるエラーメッセージ（バウンス）を送ります。その結果、そのメールアドレスはブロックされ、 後に登録しても電子メールは届きません。 このサービスには別のメールアドレスを使用するか、私達に連絡する必要があります。
Tutanotaは独自のキャプチャを使用しているので、Googleキャプチャの使用に頼る必要はありません。 これによって、Googleへのリンクがないオープンソースの電子メールサービスを提供することができます。
Tutanotaはあなたのメールボックスを保護するために細心の注意を払います。 TutanotaのコードはGitHubに公開されています。セキュリティの専門家にコードの確認を依頼します。 Tutanotaに脆弱性が見つかった場合は、修正することができるように直接私たちに報告してください。