[Mimedefang] Is it possible to change envelope "from" ?

[Christoph]

Hello !

I use sendmail+mimedefang as a mailrelay between internal and external 
mailserver. I ve got a problem that some mails are not accepted by the 
internal mailserver:
( 501 Syntax error, parameters in command "MAIL From:.....
501 5.6.0 Data format error )
Is it possible to change the "envelope from" with mimedefang to produce a rfc 
conform syntax ?


Thanks
Christoph