work smart !!

- auth 설정

vi /etc/mail/sendmail.mc

DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=0.0.0.0')dnl

DAEMON_OPTIONS(`Family=inet,  Name=MSP-v4, Port=submission, M=Ea, Addr=0.0.0.0')dnl

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

apt-get install sasl2-bin

saslauthd -a pam

vi /etc/default/saslauthd

START=yes

useradd 아이디

passwd 아이디

- relay 설정

vi /etc/mail/access

service sendmail restart

relay 설정이 auth설정 보다 우선해 relay 설정되어있는 client는 auth 없이 접속 가능