diff --git a/Scripts/Billing/dkim-verify.sh b/Scripts/Billing/dkim-verify.sh
new file mode 100755
index 0000000..d6e6d60
--- /dev/null
+++ b/Scripts/Billing/dkim-verify.sh
@@ -0,0 +1,258 @@
+#!/bin/bash
+
+PROGRAM_NAME=`basename $0`
+INPUT=$1
+
+mkdir -p tmp
+
+cat << EOF > tmp/parameters.sh
+DKIM_VERSION=0
+DKIM_ALGORITHM=rsa-sha256
+DKIM_CANONICALIZATION=relaxed/relaxed
+DKIM_DOMAIN=domain
+DKIM_SUBDOMAIN=sub
+DKIM_TIMESTAMP=0
+DKIM_BODY_HASH=0
+DKIM_HEADERS=0
+DKIM_BASE64_SIGNATURE=0
+DKIM_SIGNATURE=0
+EOF
+
+# Split email text in to 2 parts, the email headers and the email body
+cat $INPUT | tr -d '\r' | (
+# cat $INPUT | (
+  echo -n "" > tmp/headers.txt
+  while IFS= read -r line
+  do
+    echo "$line" >> tmp/headers.txt
+    if [ "$line" == '' ]
+    then
+	  break
+    fi
+  done
+  echo -n "" > tmp/body.txt
+  while IFS= read -r line
+  do
+    echo "$line" >> tmp/body.txt
+  done
+)
+
+# Handles a single trailing empty line
+# Perhaps this needs to remove all trailing empty lines?
+LAST_LINE=`tail -n 1 tmp/body.txt`
+if [ "$LAST_LINE" == '' ]
+then
+	sed -i '$ d' tmp/body.txt
+fi
+
+# Assuming dkim 'relaxed' canonicalization
+cat tmp/body.txt | sed 's/[ \t][ \t]*/ /g' | sed 's/[ \t]$//g' | unix2dos > tmp/cbody.txt
+cat tmp/headers.txt | sed -e 's/\(.*\)[ \t]*:[ \t]\(.*\)/\L\1:\E\2/' | sed ':a;N;$!ba;s/[ \t]*\n[ \t][ \t]*/ /g' > tmp/cheaders.txt
+
+echo -n "dkim-signature:" > tmp/signature.txt
+cat tmp/cheaders.txt | while read LINE
+do
+	HEADER_FIELD=`echo "$LINE" | cut -d ':' -f 1`
+	HEADER_VALUE=`echo "$LINE" | cut -d ':' -f 2-`
+	# echo "  field = $HEADER_FIELD"
+	if [ "dkim-signature" == "$HEADER_FIELD" ]
+	then
+		# echo "  $HEADER_FIELD  =  $HEADER_VALUE"
+		echo "$HEADER_VALUE" | sed 's/\;/\;\n/g' | while read ATTRIB_LINE
+		do
+			ATTRIB=`echo "$ATTRIB_LINE" | tr -d ' '`
+			if [ "$ATTRIB" != "" ]
+			then
+				ATTRIB_NAME=`echo "$ATTRIB" | cut -d '=' -f 1`
+				ATTRIB_VALUE=`echo "$ATTRIB" | cut -d '=' -f 2-`
+				# echo "   ATTRIB:  $ATTRIB"
+				# echo "   -$ATTRIB_NAME- = -$ATTRIB_VALUE-"
+				[ "$ATTRIB_NAME" != "b"  ] && echo -n "$ATTRIB_LINE " >> tmp/signature.txt
+				[ "$ATTRIB_NAME" == "b"  ] && echo -n "$ATTRIB_LINE" | sed 's/b=[^;]*\(.*\)/b=\1/g' >> tmp/signature.txt
+				[ "$ATTRIB_NAME" == "v"  ] && echo "DKIM_VERSION=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "a"  ] && echo "DKIM_ALGORITHM=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "c"  ] && echo "DKIM_CANONICALIZATION=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "d"  ] && echo "DKIM_DOMAIN=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "s"  ] && echo "DKIM_SUBDOMAIN=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "t"  ] && echo "DKIM_TIMESTAMP=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "bh" ] && echo "DKIM_BODY_HASH=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "h"  ] && echo "DKIM_HEADERS=$ATTRIB_VALUE" >> tmp/parameters.sh
+				[ "$ATTRIB_NAME" == "b"  ] && echo "DKIM_BASE64_SIGNATURE=$ATTRIB_VALUE" >> tmp/parameters.sh
+			fi
+		done
+	fi
+done
+
+if [ "`cat tmp/signature.txt`" == "dkim-signature:" ]
+then
+	echo "$PROGRAM_NAME: No DKIM-Signature found"
+	exit -1
+fi
+
+# echo -n "b=" >> tmp/signature.txt
+
+. ./tmp/parameters.sh
+
+if [ "$DKIM_VERSION" != "1" ]
+then
+	echo "$PROGRAM_NAME: Unsupported DKIM version: $DKIM_VERSION"
+	exit -1
+fi
+
+BODY_HASH=0
+
+if [ "$DKIM_ALGORITHM" == "rsa-sha256" ]
+then
+	BODY_HASH=`cat tmp/cbody.txt | openssl dgst -sha256 -binary | openssl base64`
+elif [ "$DKIM_ALGORITHM" == "rsa-sha1" ]
+then
+	BODY_HASH=`cat tmp/cbody.txt | openssl dgst -sha1 -binary | openssl base64`
+else
+	echo "$PROGRAM_NAME: Unsupported DKIM signing algorithm: $DKIM_ALGORITHM"
+	exit -1
+fi
+
+if [ "$DKIM_BODY_HASH" != "$BODY_HASH" ]
+then
+	echo "$PROGRAM_NAME: DKIM body hash incorrect ($DKIM_BODY_HASH != $BODY_HASH), possibly email body has been tampered with"
+	# echo "   DKIM body hash field:  $DKIM_BODY_HASH"
+	# echo "   Calculated body hash:  $BODY_HASH"
+	# echo "Continuing"
+	exit -1
+fi
+# rm tmp/body.txt
+
+# Lookup the public key for the domain
+# PUBLIC_KEY=`dig ${DKIM_SUBDOMAIN}._domainkey.${DKIM_DOMAIN} TXT | grep rsa | cut -d '"' -f 2 | cut -d '=' -f 4`
+DOMAIN_KEY_DNS_RECORD=`host -t txt ${DKIM_SUBDOMAIN}._domainkey.${DKIM_DOMAIN}`
+RECORD_NOT_FOUND=`echo "$DOMAIN_KEY_DNS_RECORD" | grep -c -i "not found"`
+if [ "$RECORD_NOT_FOUND" != "0" ]
+then
+	echo "$PROGRAM_NAME: DKIM domain key not found in DNS"
+	# echo "Continuing"
+# if TESTING
+	exit -1
+fi
+#	echo "Copying over file"
+#	rm tmp/key.pub
+#	cp misc/key.pub tmp/key.pub
+#	echo "Copied over file"
+#else # !TESTING
+
+# echo "DOMAIN_KEY_DNS_RECORD= -$DOMAIN_KEY_DNS_RECORD-"
+# | tr -d '["\\ ]' | sed 's/.*;p=\(.*\)/\1/g' | cut -d ';' -f 1
+
+# echo "DOMAIN_KEY_DNS_RECORD= -`echo "$DOMAIN_KEY_DNS_RECORD" | sed 's/.*[\073 \t\$]p=\(.*\)[\073 \t\$].*/\1/g' | tr -d ' \"'`-"
+PUBLIC_KEY=`echo "$DOMAIN_KEY_DNS_RECORD" | tr -d '["\\ ]' | sed 's/.*;p=\(.*\)/\1/g' | cut -d ';' -f 1`
+# | cut -d '"' -f 2,4 | tr -d '[" ]' | tr ';' '\n' | grep "p=" | cut -d '=' -f 2`
+
+# TODO: Need to see if the 'test' flag is set eg:  't=y' is in the TXT of the DNS record
+
+# echo PUBLIC_KEY=$PUBLIC_KEY
+
+# echo " DOMAIN_KEY_DNS_RECORD = $DOMAIN_KEY_DNS_RECORD "
+
+LAST_CHAR=`echo $PUBLIC_KEY | tail -c 2`
+if [ "$LAST_CHAR" == "\\" ]
+then
+	# echo "fixing key"
+	PUBLIC_KEY=`echo $PUBLIC_KEY | head -c -2`
+fi
+
+# Convert to a format that openssl can understand
+echo -----BEGIN PUBLIC KEY----- > tmp/key.pub
+echo $PUBLIC_KEY | fold -w 64 >> tmp/key.pub
+echo -----END PUBLIC KEY----- >> tmp/key.pub
+# fi # End TESTING
+
+# Dump the contents of the public key
+# echo -n "PUBLIC_MODULUS=" > secret.sh
+# openssl asn1parse -in key.pub -strparse 19 -offset 4 | cut -d ':' -f 4 | head -n 1 >> secret.sh
+# echo -n "PUBLIC_EXPONENT=" >> secret.sh
+# openssl asn1parse -in key.pub -strparse 19 -offset 4 | cut -d ':' -f 4 | tail -n 1 >> secret.sh
+
+
+echo -n "" > tmp/dkim-headers.txt
+
+HEADER_INDEX=1
+
+# echo HEADERS = "$DKIM_HEADERS"
+while true
+do
+	CURRENT_HEADER=`echo "$DKIM_HEADERS :" | cut -d ':' -f $HEADER_INDEX | tr -d '[ \t]' | sed 's/\(.*\)/\L\1/g'`
+	if [ "$CURRENT_HEADER" == "" ]
+	then
+		break
+	fi
+	# echo " header[$HEADER_INDEX] = -$CURRENT_HEADER-"
+	cat tmp/cheaders.txt | while read LINE
+	do
+		HEADER_FIELD=`echo "$LINE" | cut -d ':' -f 1`
+		# echo "$HEADER_FIELD"
+		if [ "$CURRENT_HEADER" == "$HEADER_FIELD" ]
+		then
+			echo "$LINE" >> tmp/dkim-headers.txt
+			# echo "$LINE"
+			break
+		fi
+	done
+
+	HEADER_INDEX=$((HEADER_INDEX + 1))
+done
+
+cat tmp/signature.txt >> tmp/dkim-headers.txt
+
+# cat tmp/dkim-headers.txt
+
+
+LAST_CHAR=`echo $DKIM_BASE64_SIGNATURE | tail -c 2`
+if [ "$LAST_CHAR" == "
" ]
+then
+	# echo "Fixing sig"
+	DKIM_BASE64_SIGNATURE=`echo $DKIM_BASE64_SIGNATURE | head -c -2`
+fi
+
+# echo "  DKIM_BASE64_SIGNATURE=$DKIM_BASE64_SIGNATURE"
+
+echo "$DKIM_BASE64_SIGNATURE" | fold -w 64 | base64 -d > tmp/sign.bin
+# cat tmp/sign.txt | base64 -d > tmp/sign.bin
+# cat tmp/dkim-headers.txt | head -c -1 | unix2dos > tmp/dkim-headers.dos
+uniq tmp/dkim-headers.txt | head -c -1 | unix2dos > tmp/dkim-headers.dos
+
+if [ "$DKIM_ALGORITHM" == "rsa-sha256" ]
+then
+	echo -n "$PROGRAM_NAME: "
+	cat tmp/dkim-headers.dos | openssl dgst -keyform pem -sha256 -verify tmp/key.pub -signature tmp/sign.bin
+	exit $?
+	# echo "Ret: -$?-"
+	# if verified ok, returns 0, else returns 1
+
+	# echo "Hash DOS line endings"
+	# # Convert raw hash to DER encoding by pre-pending something
+	# (echo '3031300d060960864801650304020105000420' ; cat tmp/dkim-headers.dos | sha256sum) | xxd -r -p | base64
+	# echo "Verified Hash Method 1"
+	# cat tmp/sign.bin | openssl rsautl -verify -pkcs -pubin -inkey tmp/key.pub | base64
+    #
+	# CALCULATED_HASH=`cat tmp/dkim-headers.dos | sha256sum | tr [a-z] [A-Z] | tr -d ' -'`
+	# DECRYPTED_HASH=`cat tmp/sign.bin | openssl rsautl -verify -pkcs -pubin -inkey tmp/key.pub | openssl asn1parse -inform der -offset 17 | cut -d ':' -f 4`
+	# if [ "$CALCULATED_HASH" != "$DECRYPTED_HASH" ]
+	# then
+	# 	echo "$PROGRAM_NAME: Failure, mismatched hashes"
+	#	echo "    CALCULATED_HASH = -$CALCULATED_HASH-"
+	#	echo "    DECRYPTED_HASH  = -$DECRYPTED_HASH-"
+	# fi
+
+elif [ "$DKIM_ALGORITHM" == "rsa-sha1" ]
+then
+	echo -n "$PROGRAM_NAME: "
+	cat tmp/dkim-headers.dos | openssl dgst -keyform pem -sha1 -verify tmp/key.pub -signature tmp/sign.bin
+	# echo "Ret: -$?-"
+	# if verified ok, returns 0, else returns 1
+	exit $?
+else
+	echo "$PROGRAM_NAME: Unsupported DKIM signing algorithm: $DKIM_ALGORITHM"
+	exit -1
+fi
+
+
+