[Exim] How to enforce lookup time?

    Many thanks to Philip for help (about sender_data
in ACL).

    Another question, which I couldn't solve: How to
force sleep for some seconds in string expansion?
My idea is to wait a few seconds, before saying "Relay not
permitted" to some spammer. So it would be useful to
write smth like ${lookup{...}fail{10seconds}}. Does
anyone have an idea?

    Bye. Alex.