hosts = 127.0.0.1
修改Courier相关设置，/etc/courier/imapd:
AUTHMODULES="authdaemon"
IMAP_CAPABILITY="IMAP4rev1 CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT
THREAD=REFERENCES SORT AUTH=CRAM-MD5 AUTH=CRAM-SHA1 IDLE"
修改/etc/courier/pop3d
AUTHMODULES="authdaemon"
POP3AUTH="LOGIN CRAM-MD5 CRAM-SHA1"
修改/etc/courier/authdaemonrc
authmodulelist="authmysql authpam"
使用mysql验证和pam验证。
修改/etc/courier/authmysqlrc
MYSQL_SERVER 127.0.0.1
MYSQL_USERNAME mysql-postfix-user
MYSQL_PASSWORD mysql-postfix-pass
#MYSQL_SOCKET /var/run/mysql/mysql.sock
MYSQL_PORT 0
MYSQL_OPT 0
MYSQL_DATABASE postfix
MYSQL_USER_TABLE users
MYSQL_LOGIN_FIELD email
MYSQL_CLEAR_PWFIELD clear
MYSQL_UID_FIELD uid
MYSQL_GID_FIELD gid
MYSQL_HOME_FIELD homedir
MYSQL_MAILDIR_FIELD maildir
SASL library
创建/etc/postfix/sasl/smtpd.conf：
pwcheck_method: PAM
PAM-MySQL
创建/etc/pam.d/smtp：
auth optional pam_mysql.so host=localhost db=postfix user=
mysql-postfix-user passwd=mysql-postfix-pass table=users
usercolumn=email passwdcolumn=clear crypt=n
account required pam_mysql.so host=localhost db=postfix user=mysql-postfix-user passwd=mysql-postfix-pass usercolumn=email passwdcolumn=clear crypt=n