diff --git a/include/sntl/sntllv2.h b/include/sntl/sntllv2.h
index d25e7eb..0b83ffc 100644
--- a/include/sntl/sntllv2.h
+++ b/include/sntl/sntllv2.h
@@ -96,6 +96,11 @@ typedef struct __connection_t {
 struct __connection_rpc_list_type;
 struct __message_t;
 
+typedef struct __pp_msg_type {
+  struct __message_t *msg;
+  list_node_t node;
+} ppmsg_t;
+
 typedef struct __channel_t {
   uint16_t cid; /** < ID of the channel */
   conn_t *connection; /** < pointer to the parent connection */
diff --git a/lib/messagesx.c b/lib/messagesx.c
index 03ee245..c0faca0 100644
--- a/lib/messagesx.c
+++ b/lib/messagesx.c
@@ -27,6 +27,8 @@
 
 #include <sntl/sntllv2.h>
 
+#include "internal.h"
+
 void _message_process(sxmsg_t *msg)
 {
   chnl_t *chan = msg->pch;
@@ -58,15 +60,86 @@ void _message_process(sxmsg_t *msg)
   return;
 }
 
-int sxmsg_send(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **msg)
+static inline int __sxmsg_send(chnl_t *channel, const char *data, size_t datalen,
+                               sxmsg_t **omsg, int pp)
 {
-  return SNE_FAILED;
+  conn_t *co;
+  sxmsg_t *msg;
+  sntllv2_head_t *head;
+  ppmsg_t *ppm;
+  int msgidx, r;
+
+  if(!channel) return SNE_FAILED;
+  if(!data || !datalen) return SNE_FAILED;
+
+  if(!(msg = malloc(sizeof(sxmsg_t)))) return SNE_ENOMEM;
+  else memset(msg, 0, sizeof(sxmsg_t));
+
+  co = channel->connection;
+  head = &msg->mhead;
+  /* form a head */
+  head->attr = SXMSG_OPEN | SXMSG_REPLYREQ;
+  head->reserve = channel->cid;
+  head->payload_length = datalen;
+  /* init message itself */
+  pthread_mutex_init(&msg->wait, NULL);
+  pthread_mutex_lock(&msg->wait);
+  msg->pch = channel;
+  msg->payload = (void *)data;
+
+  pthread_mutex_lock(&co->idx_msg_lock);
+  msgidx = idx_allocate(&co->idx_msg);
+  if(msgidx != IDX_INVAL) co->messages[msgidx] = msg;
+  pthread_mutex_unlock(&co->idx_msg_lock);
+
+  if(msgidx == IDX_INVAL) {    r = SNE_MMESSAGES;    goto __freemsg;  }
+  else head->msgid = (uint16_t)msgidx;
+
+  /* ready to send it */
+  if(!pp) {
+    r = _sntll_writemsg(co, msg);
+    if(r != SNE_SUCCESS) goto __closemsg;
+  } else { /* postponed */
+    if(!(ppm = malloc(sizeof(ppmsg_t)))) { r = SNE_ENOMEM; goto __closemsg; }
+    list_init_node(&ppm->node);
+    ppm->msg = msg;
+
+    /* under locking here */
+    pthread_mutex_lock(&co->write_pending_lock);
+    list_add2tail(&co->write_pending, &ppm->node); /* push it to the FIFO */
+    pthread_mutex_unlock(&co->write_pending_lock);
+  }
+
+  pthread_mutex_lock(&msg->wait); /* we will sleep here */
+
+  if(head->payload_length) {
+    *omsg = msg;
+    return head->opcode;
+  } else r = head->opcode;
+
+ __closemsg:
+  pthread_mutex_lock(&co->idx_msg_lock);
+  idx_free(&co->idx_msg, msgidx);
+  co->messages[msgidx] = NULL;
+  pthread_mutex_unlock(&co->idx_msg_lock);
+ __freemsg:
+  /* free resources for message */
+  pthread_mutex_unlock(&msg->wait);
+  pthread_mutex_destroy(&msg->wait);
+  free(msg);
+
+  return r;
+}
+
+int sxmsg_send(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **omsg)
+{
+  return __sxmsg_send(channel, data, datalen, omsg, 0);
 }
 
 /* the same - postponed message i.e. will be written to the queue - not to write immendatly */
-int sxmsg_send_pp(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **msg)
+int sxmsg_send_pp(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **omsg)
 {
-  return SNE_FAILED;
+  return __sxmsg_send(channel, data, datalen, omsg, 1);
 }
 
 /* send a pulse message */
@@ -101,13 +174,63 @@ int sxmsg_rreply_pp(sxmsg_t *msg, const char *data, size_t datalen)
   return SNE_FAILED;
 }
 
+static inline int __sxmsg_return(sxmsg_t *msg, int opcode, int pp)
+{
+  chnl_t *ch;
+  conn_t *co;
+  sntllv2_head_t *head;
+  ppmsg_t *ppm;
+  int r;
+
+  /* a little bit of paranoid tests */
+  if(!msg) return SNE_FAILED;
+  if(!(ch = msg->pch)) return SNE_FAILED;
+  if(!(co = ch->connection)) return SNE_FAILED;
+
+  head = &msg->mhead;
+  head->attr = 0;
+  head->attr |= SXMSG_CLOSED;
+  head->opcode = opcode;
+  head->payload_length = 0;
+
+  if(!pp) {
+    /* free index */
+    pthread_mutex_lock(&co->idx_msg_lock);
+    idx_free(&co->idx_msg, head->msgid);
+    co->messages[head->msgid] = NULL;
+    pthread_mutex_unlock(&co->idx_msg_lock);
+
+    r = _sntll_writemsg(co, msg);
+  } else {
+    if(!(ppm = malloc(sizeof(ppmsg_t)))) return SNE_ENOMEM;
+    else { /* remove it */
+      pthread_mutex_lock(&co->idx_msg_lock);
+      idx_free(&co->idx_msg, head->msgid);
+      co->messages[head->msgid] = NULL;
+      pthread_mutex_unlock(&co->idx_msg_lock);
+    }
+
+    list_init_node(&ppm->node);
+    ppm->msg = msg;
+
+    /* under locking here */
+    pthread_mutex_lock(&co->write_pending_lock);
+    list_add2tail(&co->write_pending, &ppm->node); /* push it to the FIFO */
+    pthread_mutex_unlock(&co->write_pending_lock);
+
+    r = SNE_SUCCESS;
+  }
+
+  return r;
+}
+
 int sxmsg_return(sxmsg_t *msg, int opcode)
 {
-  return SNE_FAILED;
+  return __sxmsg_return(msg, opcode, 0);
 }
 
 int sxmsg_return_pp(sxmsg_t *msg, int opcode)
 {
-  return SNE_FAILED;
+  return __sxmsg_return(msg, opcode, 1);
 }
 
diff --git a/lib/sntllv2.c b/lib/sntllv2.c
index 050c85d..35961d7 100644
--- a/lib/sntllv2.c
+++ b/lib/sntllv2.c
@@ -570,7 +570,7 @@ static void *__sntll_thread(void *b)
             msg->pch = channel;
             /* copy header only */
             memcpy(&msg->mhead, mhead, sizeof(sntllv2_head_t));
-            msg->payload = bbuf;
+            if(mhead->payload_length) msg->payload = bbuf;
           }
 
           pthread_mutex_lock(&co->idx_ch_lock);
@@ -602,6 +602,7 @@ static void *__sntll_thread(void *b)
               if(msg->payload) memcpy(msg->payload, bbuf, mhead->payload_length);
               else msg->mhead.opcode = SNE_ENOMEM;
             }
+            /* TODO: remove this message from list */
             pthread_mutex_unlock(&msg->wait); /* wake up thread waiting for */
           }
         } else if((!(mhead->attr & SXMSG_CLOSED) && !(mhead->attr & SXMSG_OPEN)) &&