Problem with <PRE> tag of the converted messages

My problem is very simple:

Since many eMail programs automatically wrap lines after lets say 79 chars or 
so....

So how do i get rid of the <PRE> formatting, which MHonArc does to the eMails 
(I couldn't find anything in the documentation) og how do i get MHonArc to 
break lines longer as XX chars at conversion time ??

Regards,
Martin List-Petersen