verify the ssl certificate chain for multiple domains using openssl

verify-chain

#!/bin/bash

readonly FILE='domains.list'
readonly MAX_CHAIN_LENGTH=5
readonly PORT=443

while IFS= read -r domain; do
    echo -ne "${domain} $(/usr/bin/dig ${domain} +short | tail -n 1)\n"
    echo QUIT | /usr/bin/openssl s_client -verify ${MAX_CHAIN_LENGTH} -connect ${domain}:${PORT} 2>1 | grep 'Verify return code'
done < "$FILE"