[Exim] exim 3 - command line issue

I noticed that when I send a mail from a script/cmdline using exim,
and the text in the body contains "From " at the beginning of a line
(_anywhere_ in the text) then it becomes replaced to ">From ".
Eg.: text

"line1
From this moment... 2
whatever 3
from 4
Grom 5
From 6
anything 7"

cat text | mail xxx@???
(tried mail [exim] -t too)

becomes:
"line1
>From this moment... 2
whatever 3
from 4
Grom 5
>From 6
anything 7"

(Watch for the ">" at line 2 and 6)

Exim version 3.36#1 (debian).
Am I missing something, or is it a feature?
Anyone else? (Exim 4?)


Cheers, G.