Remote content in an email can load from a sender’s server when a message is viewed. Apple Mail offers a privacy-protection mode and a separate approach that waits for you to allow remote content. Choose the behaviour intentionally rather than judging it only by whether newsletter images appear.

In Mail on Mac, open Mail, Settings, Privacy. Record the current choices before changing them, especially on a computer used for an established work process.

Understand the loading behaviour

Apple describes Protect Mail Activity as hiding your IP address and privately downloading remote content in the background when a message arrives. It is therefore not the same as a rule that downloads no remote material at all.

If Protect Mail Activity is deselected, the settings allow Hide IP Address and Block All Remote Content to be chosen separately. With remote content blocked, Mail indicates that the message contains it and waits for you to choose whether to load it.

Apple also notes that turning off Limit IP Address Tracking for the active Wi-Fi or Ethernet network prevents the sender-IP hiding behaviour on that network. Review that dependency if the privacy result matters, rather than assuming the Mail checkbox alone describes the complete setup.

Check a familiar message

Use an ordinary message from a source you recognise to inspect the chosen behaviour. Look for the remote-content notice and decide whether its images are necessary to understand the message. Do not use an unexpected attachment or suspicious link as a privacy test.

Keep the reason for the setting clear. A person who wants manual control over downloads may prefer a different experience from someone who wants images available with Mail’s background privacy protection.

These controls govern remote email content. They do not establish that a sender is trustworthy or that a requested action is legitimate. Continue checking the message’s purpose and source before following instructions.

After the test, close the message and retain the selected settings. If you change networks or accounts later, revisit the relevant configuration rather than assuming an earlier test established every future session’s behaviour.

References: Apple: Mail privacy settings.