[Exim] bounce mails with specified size

Hi there,

does anybody know how I can configure my exim-3.13 to bounce mails
that have a specified size.
I've found the paramter: message_size_limit = 1024k
But with this parameter, the message, that will return to sender ist the
standart-message. So how can I configure exim to send a specified
text to sender and a notify message to our operator ?




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Jens