Debian exim4 configuration problems

In debian exim4 configuration problems, the exim4 In Debian is configured to be in internet mode and can be sent to the internet, but cannot be sent to the mail server in the LAN. the/var/log/exim4/mainlog prompt is: ** xxx@nlpr.ia.ac.cn: all relevant MX records point to non-existent hosts is caused by/etc/exim4/exim4.conf. dnslookup: debug_print = "R: dnslookup for $ local_part @ $ domain" driver = dnslookup domains =! + Local_domains transport = remote_smtp restart = yes # ignore private rfc1918 and APIPA addresses restart = 0.0.0.0: 127.0.0.0/8: 192.168.0.0/16: \ 172.16.0.0/12: 10.0.0.0/8: 255./ 16: \ commandid 255.255 no_more that is to say, nlpr.ia.ac.cn (192.168.82.3) has been ignore, and "192.168.0.0/16:" In the above Code is deleted. Everything is fine.