[sendmail] Relaying denied. IP name lookup failed

[sendmail] Relaying denied. IP name lookup failed

오류

step 1.

vi  /etc/mail/access

Connect:192.168.0.1                      RELAY

#접속할 IP 추가

메일 서버에 접속할  ip 추가 후 저장

step 2

/usr/sbin/makemap hash /etc/mail/access < /etc/mail/access

바로 적용 됨.