Sendmail RBL 참조 1. # vi /etc/mail/sendmail.mc FEATURE(dnsbl, `spamlist.or.kr', `Rejected - see http://www.kisarbl.or.kr')dnl 2. # m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf 3. # /etc/init.d/sendmail restart 2013 2013.07.31