Sendmail 설정 (메일 발송)

sendmail 설정 #1 (메일 발송)

1 사전 작업

sendmail 설치

2 sendmail.mc 수정

[root@zetawiki ~]# cp /etc/mail/sendmail.mc /etc/mail/sendmail.mc.original
[root@zetawiki ~]# vi /etc/mail/sendmail.mc
[root@zetawiki ~]# diff /etc/mail/sendmail.mc.original /etc/mail/sendmail.mc

52,53c52,53
< dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
< dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
---
> dnl #TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
> dnl #define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

3 sendmail.cf 생성, 보존

[root@zetawiki ~]# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
[root@zetawiki ~]# cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.original

4 서비스 재시작

[root@zetawiki ~]# service sendmail restart
Shutting down sm-client:                                   [  OK  ]
Shutting down sendmail:                                    [  OK  ]
Starting sendmail:                                         [  OK  ]
Starting sm-client:                                        [  OK  ]

5 포트 확인

[root@zetawiki ~]# netstat -anp | grep sendmail | grep LISTEN
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      29241/sendmail

6 메일 발송 테스트 1

[root@zetawiki ~]# telnet localhost 25
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 zetawiki.com ESMTP Sendmail 8.14.4/8.14.4; Wed, 25 Feb 2015 09:30:26 +0900
mail from: root@zetawiki.com
250 2.1.0 root@zetawiki.com... Sender ok
rcpt to: 지메일계정@gmail.com
250 2.1.5 지메일계정@gmail.com... Recipient ok
data
354 Enter mail, end with "." on a line by itself
hello, sendmail test.
.
250 2.0.0 t1P2BQ8F029266 Message accepted for delivery
quit
221 2.0.0 zetawiki closing connection
Connection closed by foreign host.

[root@zetawiki ~]# cat /var/log/maillog | grep t1P2BQ8F029266 
Feb 25 11:11:32 zetawiki sendmail[29266]: t1P2BQ8F029266: Authentication-Warning: zetawiki: zetawiki.com [127.0.0.1] didn't use HELO protocol
Feb 25 11:11:55 zetawiki sendmail[29266]: t1P2BQ8F029266: from=root@zetawiki.com, size=22, class=0, nrcpts=1, msgid=<201502250211.t1P2BQ8F029266@zetawiki>, proto=SMTP, daemon=MTA, relay=zetawiki.com [127.0.0.1]
Feb 25 11:11:59 zetawiki sendmail[29273]: t1P2BQ8F029266: to=지메일계정@gmail.com, ctladdr=root@zetawiki.com (0/0), delay=00:00:17, xdelay=00:00:04, mailer=esmtp, pri=120022, relay=gmail-smtp-in.l.google.com. [173.194.72.27], dsn=2.0.0, stat=Sent (OK 1424830407 fl2si24167316pab.161 - gsmtp)

← 정상 발송됨(Sent OK)

Gmail에서 확인해보니 메일이 잘 도착하였음

보낸 사람: root <root@zetawiki.com>

제목: (제목 없음)

내용: hello, sendmail test.

7 메일 발송 테스트 2

[root@zetawiki ~]# echo 'this is test2.' | mail -s 'sendmail test2' 지메일계정@gmail.com

gmail에서 확인하니 메일이 잘 도착하였음

보낸사람: root <root@zetawiki.com>

제목: sendmail test2

본문: this is test2.

8 후속 작업

sendmail 설정 (메일 수신)

9 같이 보기

sendmail 설치

10 참고 자료