Instructions for obtaining the raw content of an email message

Thunderbird

1. Select the message.
2. Click the menu View > Message Source.
3. A new pane will open showing the raw message. Right-click on it and click Select All. Right-click again and select Copy, and then paste in a new file, which is the raw message file.

Gmail

1. Open the message.
2. Click the menu (3 bars) next to Reply, at the top-right of the message pane.
3. Select Show original. The raw message will appear in a new window.
4. Click Copy to clipboard and paste the raw message to a new file.

Outlook Web (Office 365)

In the message panel,

1. Click Reply all button-down arrow.
2. Click View message details.
3. Copy and paste raw the message to a new file.

Outlook App

1. Double-click the message to open it in a new window.
2. Click the File menu and then click the Properties button.
3. Copy and paste raw the message to a new file.

Outlook for Mac

1. Right-click or CONTROL + click the message.
2. Select View Source.
3. Copy and paste raw the message to a new file.

Apple Mail

1. Open the email message.
2. Click on File, and on Save As... from the drop-down menu.
3. Ensure the Format is set to Raw Message Source, and then click Save.