交换电子邮件通常是一件安全的事情，提供商会负责您发送和接收的电子邮件的安全性。然而，电子邮件(Email)加密可能并非在您使用的所有电子邮件服务中都可用。如果您想进一步保护您的电子邮件，您可能希望在您的电子邮件应用程序中使用它。
只要您使用 Mac，您就可以从您机器上的股票电子邮件应用程序发送加密电子邮件(send encrypted emails)。
内置的邮件(Mail)应用程序允许您在发送电子邮件之前对其进行加密。此加密过程实际上需要您在Mac上安装电子邮件证书。该证书可以从任何可用的在线提供商处获得。甚至还有一项免费服务可以免费为您提供此证书。
完成所有设置后，您就可以从Mac上的(Mac)Mail应用程序发送加密电子邮件。这些电子邮件的内容将被加密，这意味着如果有人设法访问这些电子邮件，他们将能够阅读的只是屏幕上毫无意义的乱码。
为您的电子邮件地址获取免费的电子邮件加密证书(Get a Free Email Encryption Certificate For Your Email Address)
您需要做的第一件事是从在线供应商那里获得证书。(get a certificate from one of the suppliers)然后，此证书将用于验证您从Mac上的(Mac)Mail应用程序发送的电子邮件。
尽管您可以使用任何服务来获取证书，但目前下面提到的一项为您提供了一个免费的服务，可用于您的个人电子邮件。
- 打开浏览器并前往Actalis网站。到达那里后，找到并单击“Free S/MIME certificates”链接。
- 申请证书的表格将出现在您的屏幕上。您需要填写您的个人信息。在电子邮件字段中(Email)填写(Fill)您的电子邮件地址，然后单击发送验证电子邮件(Send Verification Email)按钮。
- 您将收到一封包含代码的电子邮件。从您的电子邮件中复制代码。
- 返回表单页面并将代码粘贴到验证码(Verification code)字段中。然后输入验证码，勾选所需的框，然后单击底部的提交请求。(Submit Request)
- 以下屏幕将显示您的证书的密码。您想记下它，因为它不会再次出现。
您的电子邮件证书申请已提交。您很快就会收到一封附有您的证书的电子邮件。
在 Mac 上安装免费电子邮件证书(Installing The Free Email Certificate On Your Mac)
收到证书后，您需要将其安装在Mac上的(Mac)Keychain应用程序中。然后，您可以在Mail应用程序中使用它从您的(Mail)Mac发送加密电子邮件。
- 从电子邮件中下载(Download)证书 .zip 文件并将其内容提取到您的Mac中。
- 双击(Double-click)提取的证书文件以将其安装在您的计算机上。
- 它会要求您输入证书的密码。输入您在申请证书时记下的密码。然后点击OK继续。
证书将添加到应用程序中，但是，您不会在屏幕上收到任何通知。
确认证书确实安装在钥匙串中(Confirming The Certificate Was Indeed Installed In Keychain)
如果您想验证证书的安装过程是否顺利，您可以通过启动Keychain并访问您的证书来完成。
- 单击Launchpad，搜索Keychain Access，然后单击它。它会打开。
- 在主界面上，从左侧栏中选择我的证书(My Certificates)，它将让您查看已安装的证书。
- 您将在右侧窗格中看到新安装的电子邮件证书。
这表明证书已成功安装在您的Mac上。
从 Mac 上的邮件应用程序发送加密电子邮件(Send Encrypted Emails From The Mail App On Your Mac)
现在证书已安装并且您已对其进行验证，您已准备好开始从计算机上的邮件(Mail)应用程序发送加密的传出电子邮件。没有进一步的配置，您基本上需要做的就是撰写一封新电子邮件并将其发送出去。
如果您已经打开了Mail应用程序，您希望在执行以下步骤之前将其关闭。
- 在Mac(Mac)上使用您喜欢的方式启动Mail应用程序。
- 要撰写新的加密电子邮件，请单击顶部的文件菜单并选择(File)新消息(New Message)选项。
- 新的电子邮件编辑器窗口将打开。在“收件人(To)”字段中输入收件人的电子邮件地址，输入主题，输入电子邮件正文，然后在点击发送按钮之前，单击复选标记图标并确保它是蓝色的。
- 您的数字签名电子邮件将发送给您的收件人。进行此交换后，您实际上可以发送加密的电子邮件。返回到新的电子邮件撰写窗口并填写必填字段。然后单击主题(Subject)字段旁边的锁定图标，它会变成蓝色。
然后，您可以发送您的电子邮件。
您刚刚撰写的电子邮件将首先使用您的证书加密，然后发送给您的收件人。
从您的 Mac 发送未加密的电子邮件(Send An Unencrypted Email From Your Mac)
您不必仅仅因为您的机器上安装了证书就需要发送加密电子邮件。(send encrypted emails)您仍然可以发送和接收常规电子邮件。
- 只需(Simply)编写一封新电子邮件，不要启用锁定和复选标记图标。
然后，您的电子邮件将作为没有加密的普通电子邮件发送。
从您的 Mac 中删除电子邮件加密证书(Remove The Email Encryption Certificate From Your Mac)
如果您不再希望使用您的证书，或者您打算用新的证书替换它，您可能需要将它从您的Mac中删除。
- 启动钥匙串(Keychain)应用程序。
- 像在上述部分之一中一样找到您的证书。
- 右键单击您的证书并选择Delete。
您将无法再从Mac发送加密电子邮件。
How To Send Encrypted Emails From Your Mac
Exchanging emails has usually been a safe matter and the providers take care of the securіty of the emails that you send and receive. Emaіl encryption however is something that may not be available in all the email services that you use. If уou want to further secure your emails, you may want to use it in your email apps.
As long as you use a Mac, you can send encrypted emails from the stock email app on your machine.
The built-in Mail app allows you to encrypt your emails before they’re sent out. This encryption process actually requires you to install an email certificate on your Mac. This certificate can be obtained from any of the online providers available out there. There’s even a free service that gives you this certificate at no cost.
Once it has all been set up, you can send encrypted emails from the Mail app on your Mac. The contents of these emails will be encrypted meaning if someone manages to get access to these emails, all they’ll be able to read is scrambled text on their screen that has no meaning at all.
Get a Free Email Encryption Certificate For Your Email Address
The first thing you’ll need to do is get a certificate from one of the suppliers online. This certificate will then be used to validate the emails you send from the Mail app on your Mac.
Although you can use any service to get a certificate, currently the one mentioned below gives you a free one to use for your personal emails.
- Open a browser and head over to the Actalis website. Once you’re there, find and click on the link that says Free S/MIME certificates.
- A form to request a certificate will appear on your screen. You need to fill it in with your personal information. Fill in your email address in the Email field and click on the Send Verification Email button.
- You’ll receive an email with a code. Copy the code from your email.
- Get back to the form page and paste the code into the Verification code field. Then enter the captcha, tick-mark the required boxes, and click on Submit Request at the bottom.
- The following screen will display the password for your certificate. You want to note it down as it won’t appear again.
Your application for an email certificate has been submitted. You’ll shortly receive an email with your certificate attached to it.
Installing The Free Email Certificate On Your Mac
Once you receive the certificate, you’ll need to install it in the Keychain app on your Mac. It’ll then let you use it in the Mail app to send encrypted emails from your Mac.
- Download the certificate .zip file from the email and extract its contents to your Mac.
- Double-click on the extracted certificate file to install it on your machine.
- It’ll ask you to enter the password for the certificate. Type the password that you noted down while applying for the certificate. Then hit OK to continue.
The certificate will be added to the app, however, you won’t get any notifications on your screen.
Confirming The Certificate Was Indeed Installed In Keychain
If you want to verify the installation process went well for the certificate, you can do it by launching Keychain and accessing your certificate.
- Click on Launchpad, search for Keychain Access, and click on it. It’ll open.
- On the main interface, select My Certificates from the left sidebar and it’ll let you view your installed certificates.
- You’ll see your newly installed email certificate in the right-hand side pane.
It indicates the certificate was successfully installed on your Mac.
Send Encrypted Emails From The Mail App On Your Mac
Now that the certificate is installed and you’ve verified it, you’re ready to start sending encrypted outgoing emails from the Mail app on your machine. There’s no further configuration and all you basically need to do is compose a new email and send it out.
If you have the Mail app already open, you want to close it before you follow the following steps.
- Launch the Mail app using your preferred way on your Mac.
- To compose a new encrypted email, click on the File menu at the top and select the New Message option.
- The new email composer window will open. Enter your recipient’s email address in the To field, type the subject, type the body of the email, and before you hit that send button, click on the checkmark icon and ensure it’s blue.
- Your digitally signed email will be sent to your recipient. Once this exchange is made, you can actually send an encrypted email. Return to the new email compose window and fill in the required fields. Then click on the lock icon next to the Subject field and it’ll turn blue.
You can then send out your email.
The email you just composed will be first encrypted using your certificate and then sent out to your recipient.
Send An Unencrypted Email From Your Mac
You don’t necessarily need to send encrypted emails just because you have the certificate installed on your machine. You can still send and receive regular emails.
- Simply compose a new email and don’t enable the lock and check-mark icons.
Your email will then be sent as a regular email with no encryption applied to it.
Remove The Email Encryption Certificate From Your Mac
If you no longer wish to use your certificate or if you’re going to replace it with a new one, you might want to remove it from your Mac.
- Launch the Keychain app.
- Locate your certificate like you did in one of the above sections.
- Right-click on your certificate and select Delete.
You’ll no longer be able to send encrypted emails from your Mac.
