Some urgent Probleme with email notification

I’ve got a partener who send me an email notification with a URL in the body of the mime message.
First, i’ve use a save piplinetofile fonction for retreive the body but now (i don’t know why!) it doesnt work anymore!
I wish use the mime fonctions of Webmethods but i realy dont understand HOW TO GET MY mime message in the pipeline? The help guide say that “is depend of the method i use” but i don’t have any!
Is it some Java programming or a simple use that i missed?
(i use Buissiness Connector 4.6 SR3 with lotus mail server 6.0.10)
Thank for your help…