Steffen Wolf wrote:

> What happened then is that the failure notice got frozen and deleted
> after two days, but it could have been delivered locally, if only I knew
> how to tell exim that this particular email address (...@gmx) can be
> delivered to ...@localhost instead.

add a router at the top of the routers section:

remote_local:
driver = redirect
domains = gmx.de
local_parts = steffen.wolf
data = the_local_username


> Btw. I noticed a line "freeze_tell = postmaster" in
> /etc/exim4/conf.d/main/02_exim4-config_options which supposedly tells
> postmaster about the frozen messages. Well, in short, it didn't. Is

-- snip --
message. If freeze_tell is set, Exim generates a warning message whenever it
freezes something, unless the message it is freezing is a locally-generated
bounce message. (Without this exception there is the possibility of
looping.)
-- snip --