in order to solve the PB i did theses changes in vain:
– update EmailInputEncodings
utf-8, iso-8859-1, us-ascii
to EmailInputEncodings iso-8859-1, utf-8, us-ascii
– SET TrustHTMLAttachments to true
– comment adddefaultcharset UTF-8 on httpd.conf
Thank you;
William
— En date de : Mar 9.2.10, jet jet jettejpopi@yahoo.fr a écrit 
jet jet jettejpopi@yahoo.fr
Objet: Source code display for html attachment
À: “rt-users@lists.bestpractical.com” rt-users@lists.bestpractical.com
Date: Mardi 9 Février 2010, 10h31
Hello,
We have got RT(3.8.1 and 3.8.2) on linux
machine(centos).
When we send a html attachement with a ticket, it
is display as text (the source code) in it.
To resolve that we have to record the html file
with UTF-8 encodage selected. This is not always possible, and it makes longer the ticket resolution process.
Thank you for your help
William