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最近正在研究qmail+vpopmail的邮件过滤，找了很多相关的软件，都觉得不好，主要是讨厌他们的依附关系太复杂，有的甚至还要对qmail进行改动，嫌太麻烦。
然后在inter7.com发现了eps，目前是0.5。研究了一下，搞了一个相当暴力的过滤方法出来，有兴趣的就看看吧。

练习的前提是qmail+vpopmail已经装好，而且正常运作。

首先当然是下载eps了，在Inter7.com下载。展开源代码包后
make
make install
就可以了。

然后写了这个小程序mime.c

#include
#include

char *exts[]={
".vbs",
".scr",
".exe",
".com",
NULL
};

int efilter_check_mime(struct mime_t *m)
{
int i = 0;
int p = 0;

if (!(m->filename))
return 0;

for (i = 0; exts[i]; i++) {
if (m->filename) {
p = strstr(m->filename, exts[i]);
if (p) {
return 1;
}
}
}

return 0;
}

int main(int argc, char *argv[])
{
int ret = 0;
char *l = NULL;
struct mime_t *m = NULL;
struct header_t *h = NULL;
struct eps_t *eps = NULL;

if (argc < 2)
eps = eps_begin(INTERFACE_STDIN, NULL);
else
eps = eps_begin(INTERFACE_FILENAME, argv[1]);

if (!eps)
return 1;

/*
Examine headers for Content/MIME information
Pass information off to EPS' internals
*/
for (h = eps_next_header(eps); h; h = eps_next_header(eps)) {
if ((h->name) %26amp;%26amp; (h->data))
eps_header_internal(eps, h);
}

/*
..skip the message body since we're not interested in
it.
*/
for (l = eps_next_line(eps, BREAK_STOP); l; l = eps_next_line(eps, BREAK_STOP));

eps_init_mime(eps);

for (m = eps_next_mime(eps); m; m = eps_next_mime(eps)) {
if (efilter_check_mime(m))
printf("rejected");
}