--- qmail-remote.c.org	Mon Jun 15 19:53:16 1998
+++ qmail-remote.c	Tue Apr 14 08:48:29 2015
@@ -29,6 +29,11 @@
 #include "timeoutread.h"
 #include "timeoutwrite.h"
 
+#include <string.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
 #define HUGESMTPTEXT 5000
 
 #define PORT_SMTP 25 /* silly rabbit, /etc/services is for users */
@@ -44,6 +49,8 @@
 stralloc host = {0};
 stralloc sender = {0};
 
+int lmtpmode = 0;
+
 saa reciplist = {0};
 
 struct ip_address partner;
@@ -86,6 +93,12 @@
 it isn't in my control/locals file, so I don't treat it as local. (#5.4.6)\n");
 zerodie(); }
 
+void temp_no_lmtp_so_long() { out("ZLMTP file can't open\n"); zerodie(); }
+void temp_no_lmtp_socketopen() { out("ZLMTP socket can't open\n"); zerodie(); }
+void temp_no_lmtp_open() { out("ZLMTP file can't open\n"); zerodie(); }
+void temp_no_lmtp_non_support_multircpt() { out("Zcurrent LMTP don't support multi rcpt...\n"); zerodie(); }
+
+
 void outhost()
 {
   char x[IPFMT];
@@ -224,7 +237,11 @@
  
   if (smtpcode() != 220) quit("ZConnected to "," but greeting failed");
  
-  substdio_puts(&smtpto,"HELO ");
+  if (lmtpmode){
+    substdio_puts(&smtpto,"LHLO ");
+  }else{
+    substdio_puts(&smtpto,"HELO ");
+  }
   substdio_put(&smtpto,helohost.s,helohost.len);
   substdio_puts(&smtpto,"\r\n");
   substdio_flush(&smtpto);
@@ -239,6 +256,9 @@
   if (code >= 400) quit("ZConnected to "," but sender was rejected");
  
   flagbother = 0;
+  if (lmtpmode && reciplist.len != 1){
+    temp_no_lmtp_non_support_multircpt();
+  }
   for (i = 0;i < reciplist.len;++i) {
     substdio_puts(&smtpto,"RCPT TO:<");
     substdio_put(&smtpto,reciplist.sa[i].s,reciplist.sa[i].len);
@@ -338,6 +358,7 @@
   int flagallaliases;
   int flagalias;
   char *relayhost;
+  struct sockaddr_un address;
  
   sig_pipeignore();
   if (argc < 4) perm_usage();
@@ -357,7 +378,11 @@
   if (relayhost) {
     i = str_chr(relayhost,':');
     if (relayhost[i]) {
-      scan_ulong(relayhost + i + 1,&port);
+      if (strcmp(relayhost + i + 1,"lmtp") == 0){
+        lmtpmode = 1;
+      }else{
+        scan_ulong(relayhost + i + 1,&port);
+      }
       relayhost[i] = 0;
     }
     if (!stralloc_copys(&host,relayhost)) temp_nomem();
@@ -380,7 +405,20 @@
     ++recips;
   }
 
- 
+  if (lmtpmode){
+    stralloc_0(&host);
+    if (host.len >= sizeof(address.sun_path) -1) temp_no_lmtp_so_long();
+    smtpfd = socket(AF_UNIX,SOCK_STREAM,0);
+    if (smtpfd == -1) temp_no_lmtp_socketopen();
+    address.sun_family = AF_UNIX;
+    strcpy(address.sun_path, host.s);
+    if (connect(smtpfd,(struct sockaddr *)&address,sizeof(address)) == -1) temp_no_lmtp_open();
+    smtp(); /* does not return */
+    close(smtpfd);
+    temp_noconn();
+    /* end program */
+  }
+
   random = now() + (getpid() << 16);
   switch (relayhost ? dns_ip(&ip,&host) : dns_mxip(&ip,&host,random)) {
     case DNS_MEM: temp_nomem();