reworked online_detect to the simpler online_query Only pipe is supported now. Use online_query="/bin/cat /path/to/file" instead of online_detect=file online_file=/path/to/file and online_query="/path/to/some/script foo" instead of online_detect=pipe online_pipe="/path/to/some/script foo" See man page masqmail.conf(5) and admin/config-transition.

#include <glib.h>
#include <stdio.h>
#include <stdlib.h>

#include "base64.h"

int
main()
{
	gchar in[58];
	gint size;

	do {
		gchar *out;

		size = fread(in, 1, 54, stdin);
		out = base64_encode(in, size);
		fputs(out, stdout);
		putchar('\n');
		g_free(out);
	} while (size == 54);
	exit(0);
}