undelivered mail returned to sender this is the postfix program at host mx 2 . essentkabel . com .
i ' m sorry to have to inform you that your message could not be
be delivered to one or more recipients . it ' s attached below .
for further assistance , please send mail to
if you do so , please include this problem report . you can
delete your own text from the attached returned message .
the postfix program
: host mailhost . castel . nl [ 195 . 85 . 130 . 71 ]
said : 550 : recipient address
rejected : user unknown in relay recipient table ( in reply to rcpt to
command )