Gmail Help

Each time you send a message, Gmail automatically selects an appropriate encoding for the language(s) in which you've composed your mail. It's possible, however, that the recipient may not be able to properly view the message you've sent.

If your contacts are having trouble viewing messages you've sent them, we recommend using 'UTF-8' (Unicode) for all outgoing mail. UTF-8 is a standard encoding that's accepted by many email clients.