diff --git a/CoreModules/generic/preconf.sh b/CoreModules/generic/preconf.sh
new file mode 100644
index 0000000..870b252
--- /dev/null
+++ b/CoreModules/generic/preconf.sh
@@ -0,0 +1,9 @@
+##-------------##
+#    Postfix    #
+##-------------##
+
+#cheking if postfix already was installed by the system and if yes it wil be removed to prevent config conflicts
+if dpkg-query -Wf'${db:Status-abbrev}' postfix 2>/dev/null | grep -q '^i'; then apt purge -y postfix; fi
+
+debconf-set-selections <<< "postfix postfix/mailname string $domain"
+debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"
\ No newline at end of file