Alexa Top 1000 Sites Using Google Email Service

#!/bin/bash
# Count the number of sites in Alexa Top 1000 who are using Google Email MX records
#
# As of Aug 27, the numbers are
# Sites Using googlemail        221
# Sites NOT using googlemail        779
#
#
# 1 Download the topsites.txt file from here
# curl -s -O http://s3.amazonaws.com/alexa-static/top-1m.csv.zip ; unzip -q -o top-1m.csv.zip top-1m.csv ; head -1000 top-1m.csv | cut -d, -f2 | cut -d/ -f1 > topsites.txt
#
# 2 make this file executeable "chmod +x this-file.sh"
#
# 3 From the command line: './this.file.sh > output.txt'

GOOGLECOUNT=0
OTHERCOUNT=0

for DOMAIN in `cat ./topsites.txt`; do
    CMD='host -t mx '$DOMAIN
    RESULT=`eval $CMD`
    #echo ' '$RESULT
    if [[ $RESULT == *google.com* ]]
    then
    LENGTH=`echo $DOMAIN|wc -c`
        echo $DOMAIN',1'
        GOOGLECOUNT=`expr $GOOGLECOUNT + 1`
    else
        echo $DOMAIN',0'
        OTHERCOUNT=`expr $OTHERCOUNT + 1`
    fi
done
echo '#Sites Using googlemail       '$GOOGLECOUNT
echo '#Sites NOT using googlemail   '$OTHERCOUNT