[Exim] Broken Pipe

Hi,

Some of the mail sent by Exim to a foreign mail server are dropped with
the the following error : Broken Pipe. In fact the real reason is that
the mail is too large. But this error is not considered by exim as a
fatal error and it try later to resend the mail.

I would like that Exim consider the Boken Pipe error as a 55x error and
then return the mail to the sender ? Is it possible ?

Thank you,

--
Raphaël Berghmans <rberghmans@???>