sendmail + dovecot

  sendmail 설치

# yum install sendmail sendmail-cf

 

sendmail.mc 파일수정

52,53 line 수정 (앞부분 dnl 제거)

TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

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

 

 116  line 수정

127.0.0.1을 0.0.0.0으로 개방

DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl

(수정 후)

DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

m4 명령으로 sendmail.cf 생성

# m4 sendmail.mc > sendmail.cf

sendmail.cf 수정

95line 수정(도메인이 있을 경우 수정. 없다면 크게 신경 안써도 됨)

# my official domain name

# ... define this only if sendmail cannot automatically determine your domain

#DjYour domian name

 445 line 보안을 위해 일부 글자 다음과 같이 삭제

O SmtpGreetingMessage=$j Sendmail $v/$Z; $b

(수정 후)

O SmtpGreetingMessage=$j Sendmail; $b

 /etc/mail/local-host-names 도메인추가

*hostname과 local-host-names과 동일한 도메인 입력할것!

 sendmail 재시작

# service sendmail restart

sendmail 테스트

# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 linux.net ESMTP Sendmail 8.13.8/8.13.8; Tue, 11 Mar 2008 17:36:47 -0400

# yum install dovecot

 

 # vi  /etc/dovecot/dovecot.conf 수정

주석 제거

# Protocols we want to be serving.

protocols = imap pop3 lmtp

# A comma separated list of IPs or hosts where to listen in for connections. 

# "*" listens in all IPv4 interfaces, "::" listens in all IPv6 interfaces.

# If you want to specify non-default ports or anything more complex,

# edit conf.d/master.conf.

listen = *                                                                    

 #/etc/dovecot/conf.d/10-auth.conf  수정

# Disable LOGIN command and all other plaintext authentications unless

# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP

# matches the local IP (ie. you're connecting from the same computer), the

# connection is considered secure and plaintext authentication is allowed.

disable_plaintext_auth = no

정정

 

dovecot 서비스 재시작

 # service dovecot restart

 

 dovecot imap4 서비스 테스트

 # telnet localhost 143
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
* OK Dovecot ready.

 

 dovecot pop3 서비스 테스트

# telnet localhost 110
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
+OK Dovecot ready.

※ 만약 localhost를 제외한 외부에서 sendmail 혹은 dovecot(imap, pop3)에 텔넷 연결이 되지 않을 경우

    다음 세 가지 사항을 점검해 볼 필요가 있다.

    1. iptables            25번, 110번, 143번 포트가 방화벽에서 허용되고 있는지 유/무

    2. netstat -avp     LISTENINIG 포트 체크

    3. ps -ef | grep sendmail        혹은   ps -ef | grep dovecot

 

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/etc/dovecot/conf.d/10-mail.conf

# <doc/wiki/MailLocation.txt>

mail_location = mbox:/var/empty:INBOX=/var/spool/mail/%u:INDEX=MEMORY           추가