Find G Suite users for a given list of domains

gsuite-dig.sh

# Step 1: Create list of domains in url-list.txt

# Step 2: Run dig to output a list of MX records

while read url; do
  dig $url mx | grep MX | head -n 2 | tail -n 1
done <url-list.txt > mx-results.txt

# Step 3: Grep to isolate and count the Google users

while read mxrecord; do
  echo $mxrecord | grep -i google
done <mx-results.txt > google-users.txt

# Step 4 (optional): Grep to isolate the others

while read mxrecord; do
  echo $mxrecord | grep -i -v google
done <mx-results.txt > other-users.txt