wget http://www.ex-parrot.com/~chris/tpop3d/tpop3d-1.5.3.tar.gz

tar zxvf tpop3d-1.5.3.tar.gz

cd tpop3d-1.5.3

./configure --enable-mbox-maildir --enable-mbox-bsd --enable-tls --disable-auth-pam \
--enable-auth-mysql --with-mysql-include-dir=/usr/local/mysql/include \
--with-mysql-lib-dir=/usr/local/mysql/lib
(注：--enable-tls打開ssl支持，確認已安裝openssl，如果不是安裝在默認目錄，再加上--with-openssl-root參數指定openssl所安裝的目錄)
make
make install

這時會出現：
configure: error: vmail-sql authentication enabled, but mysql_init doesn't seem to be available.
錯誤信息。

vi? configure，找到
eval "ac_cv_lib_$ac_lib_var=\"mysqlclient \"" ，更改為：
eval "ac_cv_lib_$ac_lib_var=\"mysqlclient -lz \""

然后：
./configure --enable-mbox-maildir --enable-mbox-bsd --enable-tls --disable-auth-pam \
--enable-auth-mysql --with-mysql-include-dir=/usr/local/mysql/include \
--with-mysql-lib-dir=/usr/local/mysql/lib

make
make install
這樣就安裝完成帶Mysql驗證的tpop3d，
修改/usr/local/etc/tpop3d.conf文件(如果沒有，執行：cp tpop3d.conf.sample /usr/local/etc/tpop3d.conf)：

#
# MySQL authentication options
#
# auth-mysql-enable: (yes | true)
# Enable MySQL authentication.
auth-mysql-enable: true

# auth-mysql-mail-group: (group-name | gid)
# The group name or gid under which access to the mailspool will take place.
# [default: group of user associated with virtual domain]
auth-mysql-mail-group: vmail

# auth-mysql-hostname: hostname [[hostname] hostname] ..
# Host on which to connect to MySQL. Tried in order until a working host is
# found. [default: localhost]
auth-mysql-hostname: localhost

# auth-mysql-database: database
# MySQL database to use for authentication.
auth-mysql-database: yourdatabase

# auth-mysql-username: username
# MySQL username used to access the database.
auth-mysql-username:? yourusername

# auth-mysql-password: password
# Password of MySQL user.
auth-mysql-password: yourpassword

# auth-mysql-pass-query: substitution string
# Query template to use for USER/PASS authentication. Must return mailpath,
# password, userid, mailspool type; uses substitution variables as described
# in the man page.
#auth-mysql-pass-query: SELECT mailpath, password, userid, spooltype FROM ...
auth-mysql-pass-query:? SELECT CONCAT('/var/mail/', maildir), \
??????????????????? CONCAT('{crypt}', password),????? \
??????????????????? 'vmail', 'bsd'??????????????? \
?????????????? FROM mailbox????????????????????????? \
????????????? WHERE username = CONCAT('$(local_part)', '@', '$(domain)')
由于沒有使用vmail-sql中的數據庫schema，則要將auth-mysql-pass-query配置參數修改成符合你本地數據庫schema的查詢條件。詳細情況參見：
http://www.ex-parrot.com/~chris/tpop3d/tpop3d.conf.5.html?的A note on MySQLauthentication部分