Postfix+dovecot+saslauth
环境：Centos 6.4关闭防火墙和selinux
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# postconf mail_version
mail_version = 2.6.6
#
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# yum -y install postfix dovecot cyrus* openssl openssl-devel
# sed -i '/host\.domain\.tld/imyhostname \= mail\.com' /etc/postfix/main.cf
# sed -i '/^#mydomain \=/imydomain \= mail\.com' /etc/postfix/main.cf
# sed -i '/myorigin \= \$mydomain/s/^#//g' /etc/postfix/main.cf
# sed -i '/inet_interfaces \= all/s/^#//g' /etc/postfix/main.cf
# grep 'inet_protocols = all' /etc/postfix/main.cf
inet_protocols = all
# sed -i '/inet\_interfaces \= localhost/s/inet\_interfaces/#inet\_interfaces/g' /etc/postfix/main.cf
# sed -i '/^mydestination/s/localhost/localhost\, \$mydomain/g' /etc/postfix/main.cf
# sed -i '/127\.0\.0\.0/imynetworks \= 0\.0\.0\.0\/0' /etc/postfix/main.cf
# sed -i '/^#mynetworks_style = subnet/s/^#//g' /etc/postfix/main.cf
# sed -i '/^#relay_domains/irelay_domains \= \$mydomain' /etc/postfix/main.cf
让其支持smtps
生成证书：
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# cd /etc/pki/tls/certs/
# make postfix.pem
# echo '#smtpd-tls' >> /etc/postfix/main.cf
# echo 'smtpd_tls_cert_file = /etc/pki/tls/certs/postfix.pem' >> /etc/postfix/main.cf
# echo 'smtpd_tls_key_file = /etc/pki/tls/certs/postfix.pem' >> /etc/postfix/main.cf
# echo 'smtpd_use_tls = yes' >> /etc/postfix/main.cf
# echo 'tls_random_source = dev:/dev/urandom' >> /etc/postfix/main.cf
# echo 'tls_daemon_random_source = dev:/dev/urandom' >> /etc/postfix/main.cf
# echo 'message_size_limit = 10240000' >> /etc/postfix/main.cf //限制邮件大小
# sed -i '/smtps/s/^#//g' /etc/postfix/master.cf
# sed -i '/smtpd\_tls\_wrappermode/s/^#//g' /etc/postfix/master.cf
# sed -i "19s/^#//g" /etc/postfix/master.cf
# echo -e 'group:\tyfshare,bob' >> /etc/aliases
# newaliases
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# /etc/init.d/postfix restart
# chkconfig postfix on
# telnet localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 mail.com ESMTP Postfix
···
配置DOVECOT：
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# sed -i '/protocols/s/^#//g' /etc/dovecot/dovecot.conf
# sed -i '/login_trusted_networks/s/^#//g' /etc/dovecot/dovecot.conf
# sed -i '/login_trusted_networks/s/\=/\= 0\.0\.0\.0\/0/g' /etc/dovecot/dovecot.conf
# sed -i '/INBOX\=\/var\/mail/s/^#//g' /etc/dovecot/conf.d/10-mail.conf
# sed -i '/INBOX\=\/var\/mail/s/^[ \t]*//g' /etc/dovecot/conf.d/10-mail.conf
# sed -i '/#ssl = yes/s/^#//g' /etc/dovecot/conf.d/10-ssl.conf
# /etc/init.d/dovecot restart
# chkconfig dovecot on
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# netstat -tunlp|grep 110
tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN 6272/dovecot
tcp 0 0 :::110 :::* LISTEN 6272/dovecot
# netstat -tunlp|grep 995
tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN 6272/dovecot
tcp 0 0 :::995 :::* LISTEN 6272/dovecot
# netstat -tunlp|grep 25
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 6519/master
tcp 0 0 :::25 :::* LISTEN 6519/master
# netstat -tunlp|grep 465
tcp 0 0 0.0.0.0:465 0.0.0.0:* LISTEN 6519/master
tcp 0 0 :::465 :::* LISTEN 6519/master
# netstat -tunlp|grep 143
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 6272/dovecot
tcp 0 0 :::143 :::* LISTEN 6272/dovecot
# netstat -tunlp|grep 993
tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 6272/dovecot
tcp 0 0 :::993 :::* LISTEN 6272/dovecot
#
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# tail -n 5 /etc/skel/.bashrc |head -n 3
if [ ! -d ~/mail/.imap/INBOX ];then
mkdir -p ~/mail/.imap/INBOX
fi
#
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# useradd yfshare
# useradd bob
# useradd tom
# echo '123456' |passwd yfshare --stdin
# echo '123456' |passwd bob --stdin
# echo '123456' |passwd tom --stdin
# mkdir -p /home/yfshare/mail/.imap/INBOX && chown yfshare:yfshare /home/yfshare/mail -R
# mkdir -p /home/bob/mail/.imap/INBOX && chown bob:bob /home/bob/mail -R
# mkdir -p /home/tom/mail/.imap/INBOX && chown tom:tom /home/tom/mail -R
配置saslauth：
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# sed -i '/MECH\=/s/pam/shadow/' /etc/sysconfig/saslauthd
# /etc/init.d/saslauthd restart
# chkconfig saslauthd on
# saslauthd -v
saslauthd 2.1.23
authentication mechanisms: getpwent kerberos5 pam rimap shadow ldap
# testsaslauthd -u yfshare -p 123456
0: OK "Success."
# testsaslauthd -u bob -p 123456
0: OK "Success."
# testsaslauthd -u tom -p 123456
0: OK "Success."
#
注：selinux会影响testsaslauthd使用shadow认证，如果不想关闭selinux，执行：
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# setsebool -P allow_saslauthd_read_shadow 1
pop3
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pop3s
995
smtp
25
smtps
465
imap
143
imaps993
Postfix当bob用户给yfshare发送邮件并抄送给group，且yfshare在group里，这时yfshare用户会收到两封一模一样的邮件，这是Postfix的BUG
SSL加密发送邮件：（IMAPS+SMTPS)
SSL加密发送邮件：（POP3S+SMTPS）
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# ll /home/yfshare/mail/.imap/INBOX/
total 20
-rw-rw----. 1 yfshare mail 16384 Sep 18 17:34 dovecot.index.cache
-rw-rw----. 1 yfshare mail1668 Sep 18 17:34 dovecot.index.log
# ll /var/mail/
total 16
-rw-rw----. 1 bob mail 7071 Sep 18 17:34 bob
-rw-rw----. 1 tom mail 0 Sep 18 17:10 tom
-rw-rw----. 1 yfshare mail 6955 Sep 18 17:34 yfshare
#
Sendmail+dovecot+saslauth+rainloop
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