bat 脚本

@echo off
set "file=dns.txt"
for /f "usebackq tokens=1*  " %%a in ("%file%") do (
echo %%a 
nslookup -timeout=2 -type=mx -retry=2 %%a   114.114.114.114 | find "MX"
)


shell 脚本


for kk in `cat dns.txt`
do
mx=`dig -t mx  $kk  |  grep -v "^;" | grep MX | awk -F" " '{print $6}'`
echo $kk $mx
done