You can learn all about setting up email encryption at Email encryption in Microsoft 365. For more information, see Send, view, and reply to encrypted messages in Outlook for PC. You can also send an encrypted message by selecting the Protect button in Outlook on the web. To send an encrypted message from Outlook 2013 or 2016, or Outlook 2016 for Mac, select Options > Permissions, then select the protection option you need. If you want to encrypt a message that doesn't meet a pre-defined rule or your admin hasn't set up any rules, you can apply a variety of different encryption rules before you send the message. When you set a label, the label persists with your email, even when it's sent - for example, by appearing as a header to your message.

Sensitivity labels: Your campaign can also set up sensitivity labels that you can apply to your files and email to keep them compliant with your campaign's information protection policies.

Any encryption rules will be applied automatically. For instance, your admin can create a rule that encrypts all messages sent outside your organization or all messages that mention specific words or phrases. Your admin can define rules to automatically encrypt messages that meet certain criteria. Any recipient without the corresponding private key, however, sees indecipherable text.

Only the recipient who has the private key that matches the public key used to encrypt the message can decipher the message for reading. When you encrypt an email message, it's converted from readable plain text into scrambled cypher text.

Encryption: You can encrypt your email to protect the privacy of the information in the email.Best practicesД«efore you send email with confidential or sensitive information, consider turning on: Help protect this sensitive information by using encryption and sensitivity labels so you and your email recipients treat the information with the sensitivity it requires. Your data and campaign information is important and often confidential.

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