name="test.com"

namecheck=`echo $name | grep -w  "^[A-Za-z]*..com"`

domain=[ ".es" ".com" ".de"]

egrep -q ".(com|es|de)$"

domain=( "es" "com" "de" )
str=$(printf "|%s" ${domain[@]})
str="${str:1}"

echo "abc.test.com"|egrep ".(${str})$"
abc.test.com

echo "abc.test.org"|egrep ".(${str})$"

name=test.com
domains=(es com de)
for dom in ${domains[@]}; do
    [[ $name == *.$dom ]] && echo $name && break
done

case "$name" in *.de|*.com|*.es) echo "$name" or whatever ;; esac