Why is Outlook not showing my emails in the correct font or formatting when viewing received emails?

1. Check your default font and font size settings in Outlook to ensure that all emails are being displayed in the same font.
2. Check the sent message from the sender to confirm that they have used the same font and font size that they used when initially sending the message.
3. If the same font and font size was used, and your Outlook is still not displaying it in the correct format, try clearing your cached email files.
4. If the problem persists, create a new profile using the same email address and see if this resolves the issue.