getent smtp.gmail.com
2607:f8b0:4023:1c05::6c smtp.gmail.com
getent smtp-relay.gmail.com
2607:f8b0:4023:1c03::1c smtp-relay.gmail.com
gethostbynamel smtp.gmail.com (5s max via set_time_limit)
result=["172.217.78.109"] ms=0