[EXIM] queryprogram bug or am I doing it wrong?

Hi all,

I am battling to get the queryprogram I have defined to run as a
particular user. I have defined the user and group as below, however the
program still runs as nobody regardless - am I doing something wrong?

someprogram:
driver = queryprogram
command = /usr/local/bin/program $message_id
user = mail
group = mail

Any ideas?

Regards,
Graham
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