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GPGMail is a plugin for OS X's Mail.app, which let's you
send and receive secure, OpenPGP encrypted and signed messages.

Enter to Search. Popular Apps Best Apps News CNET. Sign and verify files or messages. Manage your GPG Keychain with a few simple clicks and experience the full power of GPG easier than.

Important

GPGMail currently doesn't support macOS Sierra (10.12). We're actively working on it.Follow us on Twitter for updates.

Updates

The latest releases of GPGMail can be found on our official website.

For the latest news and updates check our Twitter.

Visit our support page if you have questions or need help setting up your system and using GPGMail.

Localizations are done on Transifex.

Prerequisite

In order to use GPGMail you need to have GnuPG installed.You can either build your own version, use one from homebrew or find a packaged version for OS X at gpgtools.org

Build

Clone the repository

Grab Dependencies

In order to communicate with GnuPG we use our own Objective-C framework called Libmacgpg.It's necessary to clone the Libmacgpg repository first, before building GPGMail.

Build

Install

Copy Libmacgpg.framework from Dependencies/Libmacgpg/build/Release/ to ~/Library/Frameworks.

After that copy the GPGMail.mailbundle file from build/Releases/GPGMail.mailbundle to ~/Libray/Mail/Bundles, re-start Mail.app and enjoy.

System Requirements

• Mac OS X >= 10.9 (macOS Sierra is not yet supported!)
• Libmacgpg
• GnuPG

Glad you made it here and thanks for your interest. In this article you'll learn how to setup your own GPG key and send your first secure email. Setup GPG Suite The first step is to download and run. When that is done, it's time to setup your GPG key. If you already have a GPG key, please, because in that case you don't need to create any new key.

If you do not have a GPG key yet, follow up with the next section: Create a new key GPG Keychain is the application you will use to manage your keys. It will let you create new keys, edit existing ones and search for your friends keys. The first thing you'll see in GPG Keychain is a wizard which will guide you through creating your first key. Email Address GPG Keychain fills the data from your OS X address book. But the fields are editable and you can change them at your will. Enter the email address you normally use when sending mail. Make sure that it is typed identical to the one used in Mail.app Preferences Accounts.

Double check that capitalisation matches, since it matters. More email addresses can be added to your key later. Upload key after generation If you enable this checkbox, your public key will be uploaded to a key server once key creation is done. Generally this is a good thing, since it will make it much easier for others to start sending you encrypted messages by simply importing your key from a key server, but once a key is uploaded to the key server, it can not be removed. This means: you will not be able to change your name once the key has been uploaded. You can always upload your public key to a key server at a later time.

Password Enter your password. As with every other password you use, it should be very strong and it's best to use a very long password,a sentence you can remember, comprised of symbols and numbers. Important: Should you forget your password, there's no way to recover it. Make sure you will remember it or store it in a safe place (no, a text note on your desk is not a safe place). Hit 'Generate key'! After a short while, you'll see a new entry in GPG Keychain with your email address showing sec/pub (secret/public) in the type column.

Every time you create a new key, a new key pair is created. It will consist of a secret key and a public key. The public key is to be shared with others, so they can send you encrypted messages.

Important: If you delete your secret key, you will no longer be able to read encrypted messages. Add your address used in Mail.app to an existing GPG key To send encrypted emails with Mail.app using GPGMail, you have to add the address used in Mail.app to your existing GPG key.

If you are 100% certain that the address used in Mail.app is already setup in your existing GPG key, then you can get started with creating:. Otherwise add your email address as User-ID to your existing key.

Double-click the sec/pub key, to which you want to add a User ID. 2. Key details will open - select the 'User IDs' tab. 3. Click the '+' to add another email address as User ID. 4. A dialog opens in which you enter Name and email address, we recommend to leave the comment field blank.

5. Click 'Generate User ID'. 6. Pinentry will ask for your password Repeate the above steps to add as many User IDs as you need. Since you now have several User IDs, it is recommended to set the most commonly used address as primary User ID. To do that:.

1. Select the User ID you want to set to 'Primary'. 2. Click the cogwheel (next to the '+'). 3. Select 'Primary' Important: If your key is on the key servers, don't forget to upload your updated key via menu Key Send to Keyserver ( ⇧⌘K). Otherwise the change will only be local and your contacts can't benefit from the new User IDs.

Your first encrypted mail Great, you're almost there! All you need for this first test is a sec/pub key in GPG Keychain matching the mail address used in Mail.app.

If you want to encrypt to other recipients than yourself, you need to retrieve their public key first. On macOS 10.14 Mojave you need to.

This is a new mechanism Apple introduced in 10.14. Open Mail.app and create a new message. You'll notice two additional buttons in your composing window. A lock icon for encryption and a star icon for the signature. For both icons: grey means disabled, black means enabled. As you have just created a key, your star icon will be enabled.

You are now ready to sign messages with your key. After you click the star icon you will see a check mark indicating that your message will be signed. Your lock icon however will be displayed in grey as you must first enter a recipient, for whom you have a public key.

For this test: enter your email address in the 'To:' field (the same address that you use to send emails from). Then your lock icon will change to black.

You are now ready to encrypt your message. Click to close the lock.

Your mail will now be encrypted. After pressing the lock or star button, the OpenPGP indicator in the top right corner will turn green. This indicates that your mail will be signed and/or encrypted. Your email should look like this: The OpenPGP indicator is green, the lock icon is locked, your message will be encrypted and a small checkmark is displayed on the star button (the message will be signed). Press send: If your password is not stored on your computer you will be asked to enter it manually (in order to sign the message).

Shorty, the mail will be delivered to yourself. You'll see that it is encrypted and signed: the lock is closed, indicating that the message was encrypted and since you can read the mail-content, it has been successfully decrypted for you. If you don't see the lock icon the message wasn't encrypted. Mail.app Preferences GPGMail allows to adjust the defaults for encrypting and signing new mails. Congrats, you've made it! To be completely honest we have to admit, we've cheated a little.

Encrypting a message can be slightly more effort, since it requires you to have the public key of the recipient(s). However adding their public keys is a task that you only do once for each recipient. How to find your friend's public key If your friends don't already have a key-pair of their own, they need to create one.

If they are not on OS X and able to use GPG Suite we recommend for Windows and for Linux. After key creation, the public key should be uploaded to a key server. Also in order for your friend to be able to encrypt or sign messages, they need to use a mail client with an OpenPGP plugin - analogue to using Mail.app with the GPGMail plugin. open GPG Keychain. press cmd ⌘ + F and enter the email address or your friends name. press 'Search key' If a public key for your search terms exists on the keyserver, you should see something like the following: Select the keys you want to import by clicking their checkboxes and press 'Retrieve key'. Then start Mail.app and write the first encrypted mail to your friend as you learned in Why all this hassle?

First, sending an encrypted message isn't more difficult than sending unsecure messages, once you've understood the basic concept. Second, by sending encrypting messages you will prevent unwanted eyes (NSA) from reading the contents of your personal mails. Third and this might not be as clear: why should you sign messages? You can compare signing a message to the process of sending a sealed letter in real life. For one, the recipient will be able to tell if the 'seal' was broken.

If anyone has been fiddling with your message your recipients will immediately see that the signature is invalid. On the other hand, they can also be sure that the message did indeed come from you and not an imposter, since only you can create that signature, with your secret key. One could fake your email address, your name, but not your signature. And that's why signing is important. This also explains why it's EXTREMELY IMPORTANT to keep your secret key and your password safe.

Otherwise, if someone gets a hold of your secret key and your password, they could forge your signature and pose as you. In addition, they could read your encrypted messages, and you really wouldn't want that. Further info. Watch. Read up on.

your keys. Setup encryption on a. to your key.