Use Mail Privacy Protection on Mac
The Mail app can help protect your privacy. Email messages you receive may include remote content that allows a sender to collect information when you view a message, such as when and how many times you view it, whether you forward it, your IP address and other data. Mail Privacy Protection prevents senders from learning your information.
If you didn’t turn on Protect Mail Activity when you first opened Mail in macOS Monterey, you can do so in Mail preferences.
In the Mail app
on your Mac, choose Mail > Preferences, then click Privacy.Select Protect Mail Activity.
When this option is selected, your IP address is hidden from senders and remote content is privately downloaded in the background when you receive a message (instead of when you view it).
If you deselect the option, you can choose to separately hide your IP address and block all remote content. When Block All Remote Content is selected, a banner is shown in a message when you view it, indicating it contains remote content; you can choose then to download the content.
Note: If you deselect the tickbox in Network preferences to limit IP address tracking for your Wi-Fi or Ethernet network, your IP address isn’t hidden from senders when using the network.