On 12/01/12 03:15, Ferenc Wagner wrote: > Hi,
>
> Please consider this line from the Exim (4.72) mainlog:
>
> 2012-01-08 05:17:20 1RjkC8-0007uf-24 <= <> R=1RjkC8-0007ue-15 U=Debian-exim P=local S=1732
>
> As I understand it, message 1RjkC8-0007ue-15 provoked a bounce, which is
> fine, but there's no other trace of 1RjkC8-0007ue-15 in the mainlog.
> How is this possible? If I send invalid mail via exim4 -i ..., that
> doesn't appear in the mainlog either, but the R field isn't present in
> the generated bounce:
>
> 2012-01-11 18:09:23 1Rl1fi-0006uz-9R <= <> U=Debian-exim P=local S=759
>
> What mechanism generated the above log line then?
A new message ID is generated for the bounce message. The contents of
the message will tell you what the source of the bounce is.
