[Exim] reject_recipients question

Can reject_recipients refer to an external file that has "keys" consisting
of regular expressions? I know that regular expressions can be used in
exim.conf, but I want to use an external list.

I tried it and it did not work. Perhaps each key must be of the form
/regex/ or begin with a circumflex character?

BTW, I use Exim version 3.02

thanks

--
Andrew

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