which is the language of antivirus.exim?

May 22, 2015
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Belo Horizonte
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Root Administrator
Hello everyone .
I want to create an algorithm to insert in antivirus.exim , but do not know what that language is . Does anyone know what the programming language is used in antivirus.exim ?

The algorithm I want to create will read a file that contains all the ips I wish block ( blacklist ) , and then stop the e-mail go to the recipient.

I know this is possible because the code below stop receiving email from a particular domain :
if $ header_from : contains "@ domain.com "
Then
text fail "This message has been rejected since this domain \ n \
is not allowed to mail here . "
seen finish​
endif​