Html mail

Hi all,
when a mail is received by rt, it arrive to admins in text and html format. The txt part arrive correctly, but the html have encoding problems… any solution?
Here an example:

------- Begin

Fri Jun 11 10:57:08 2004: Request 3037 was acted upon.
Transaction: Ticket created by ^NOSPAM^
Queue: help
Owner: Nobody
Requestors: ^NOSPAM^
Status: new
Ticket URL:



------- End

(Sorry for my very BAD english…)