[Exim] Format of a delivery error message?

Is there any description about the format of a delivery error message
created by each Exim version? I'd like to fix Ecartis mailing list
manager so that it can find failing addresses in the error message made
by any version of Exim, including any future version.

Thanks in advance.

--
"Free software is not for free."
Kaz Sasayama <Kaz.Sasayama@???>; Screen Name: kazssym
Hyper Linux Systems (Hypercore Software Design, Ltd.)
<URL:http://www.hypercore.co.jp/>