On occasion, you may receive an email message from a machine that uses an encoding that is different from the default encoding for your machine. To be able to read the message, change the character set for your machine to one that matches the message's encoding (for example, US-ASCII).
Select the message in the Message Header List.
Choose Change Char Set from the View menu or press Control+Y, the keyboard accelerator.
Mailer displays the name of a character set (for example, US-ASCII) in the footer immediately below the Toolbar icons.
Choose the Change Char Set menu item or press Control+Y again to cycle through the choices until the correct one is displayed.
Selecting Default Char Set displays your message in the default encoding for your machine.
Mailer converts the text of the message to the character set that you selected, not its header or attachments.