[exim] Mysql Blacklist in Exim

hi,
is it possible in Exim to create a personal Blacklist in a Mysql Database?
For Example when a Mail arrives, Exim should look into the
Mysql Database if the Sender exists in the Mysql table.
If the Sender is in the Mysql table then Exim should
send a Deliver Failure Message to the Sender.
Do you know what i have to change in the configuration files
for this scenario?

Thank You
Jes
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