本文介绍如何让 qmail 增加 smtpd-auth 功能．
1. 安装 qmail-smtpd
下载 qmail-smptd.patch http://www.elysium.pl/members/brush/
在 /usr/ports/mail/qmail 目录下面，patch
重新编译 qmail，并拷贝 qmail-smtpd 到 /var/qmail/bin
2. 安装 vpopmail
使用mysql数据库的，需要注意的是一定要改动 vmysql.h 文件中的 mysql密码为你的 vpopmail 用户密码；
然后改动 vchkpw.c 文件中：下面的内容，分别在相应的位置加上 #ifdef AUTHVCHKPW 和#endif
/* Since the vpopmail system runs under a uid/gid
* file system security, and since qmail-pop3d
* is required to run as the pop users uid/gid
* change to the vpasswds uid and gid
*/
#ifdef AUTHVCHKPW
if (setgid(pwent-pw_gid) == -1) {
log_exit(LOG_NOTICE, 4, "vchkpw: setgid() failed");
}
/* captn' changing group permissions, Eye Eye! */
if (setuid(pwent-pw_uid) == -1) {
log_exit(LOG_NOTICE, 5, "vchkpw: setuid() failed");
}
/* hop into thier email directory */
if (chdir(pwent-pw_dir) == -1) {
/* if the dir does not exist, create it */
if (vmake_maildir(pwent-pw_dir, pwent-pw_uid, pwent-pw_gid)==-1) {
log_exit(LOG_NOTICE, 5, "vchkpw: make user dir failed");
}
}
/* set up some environment variables */
scopy(envbuf1, VCHKPW_USER, MAX_ENV_BUF);
scat(envbuf1, pwent-pw_name, MAX_ENV_BUF);
if (putenv(envbuf1) == -1)
log_exit(LOG_NOTICE,7,"vchkpw: putenv(USER) failed");
/* now HOME */
scopy(envbuf2, VCHKPW_HOME, MAX_ENV_BUF);
scat(envbuf2, pwent-pw_dir, MAX_ENV_BUF);
if (putenv(envbuf2) == -1)
log_exit(LOG_NOTICE, 8, "vchkpw: putenv(HOME) failed");
/* Now shell */
scopy(envbuf3, VCHKPW_SHELL, MAX_ENV_BUF);
if (putenv(envbuf3) == -1)
log_exit(LOG_NOTICE, 9, "vchkpw: putenv(SHELL) failed");
/* and a vpopuser */
scopy(envbuf4, VCHKPW_VPOPUSER, MAX_ENV_BUF);
scat(envbuf4, name, MAX_ENV_BUF);
if (putenv(envbuf4) == -1)
log_exit(LOG_NOTICE, 9, "vchkpw: putenv(VPOPUSER) failed");
/* close the auth module connection */
/* kick off the next program and exit */
execvp(argv[1],argv+1);
/* yikes! the exec failed, log error */
log_exit(LOG_NOTICE, 10, "vchkpw: execvp() failed");
#endif
/* exit code of 0 */
return(0);
然后重新编译 make
cd work/vpopmail* 目录，cp vchkpw /home/vpopmail/bin/authvchkpw
chmod a+s /home/vpopmail/bin/authvchkpw
以下ports安装是在vpopmail老的版本上通过，心版本没有测试，因此不建议采用 ports 安装。
在 /usr/ports/mail/vpopmail/下面增加 files 目录，并建立下面两个 patch 文件
文件patch-aa，内容如下：
+++ vmysql.h
27c27
---
#define MYSQL_PASSWD "mypassword"
文件 patch-bb，内容如下：
+++ vchkpw.c
310a311
311a313
313a316,317
#ifdef AUTH_VCHKPW
359a364,365
#endif
然后make -D WITHOUT_ROAMING -D WITH_MYSQL DEFAULT_DOMAIN=sczg.net，重新编译
cd work/vpopmail* 目录，cp vchkpw /home/vpopmail/bin/authvchkpw
chmod a+s /home/vpopmail/bin/authvchkpw
3. 把 smtp 的 tcpserver 命名改为：
/usr/local/bin/tcpserver -u 82 -g 81 0 smtp /var/qmail/bin/qmail-smtpd \
/usr/local/vpopmail/bin/authvchkpw \
2%26amp;1 | /var/qmail/bin/splogger smtpd 3 %26amp;
重新启动相应的 tcpserver即可．