diff --git a/ompi/mca/mtl/portals4/mtl_portals4.c b/ompi/mca/mtl/portals4/mtl_portals4.c
index 78f2c5243f..a18723b5ec 100644
--- a/ompi/mca/mtl/portals4/mtl_portals4.c
+++ b/ompi/mca/mtl/portals4/mtl_portals4.c
@@ -72,34 +72,34 @@ ompi_mtl_portals4_add_procs(struct mca_mtl_base_module_t *mtl,
         size_t size;
 
         if (procs[i]->proc_arch != ompi_proc_local()->proc_arch) {
-            opal_output(ompi_mtl_base_output,
-                        "Portals 4 MTL does not support heterogeneous operations.");
-            opal_output(ompi_mtl_base_output,
-                        "Proc %s architecture %x, mine %x.",
-                        ORTE_NAME_PRINT(&procs[i]->proc_name), 
-                        procs[i]->proc_arch, ompi_proc_local()->proc_arch);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "Portals 4 MTL does not support heterogeneous operations.");
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "Proc %s architecture %x, mine %x.",
+                                ORTE_NAME_PRINT(&procs[i]->proc_name), 
+                                procs[i]->proc_arch, ompi_proc_local()->proc_arch);
             return OMPI_ERR_NOT_SUPPORTED;
         }
 
         mtl_peer_data[i] = malloc(sizeof(struct mca_mtl_base_endpoint_t));
         if (NULL == mtl_peer_data[i]) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: malloc failed: %d\n",
-                        __FILE__, __LINE__, ret);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: malloc failed: %d\n",
+                                __FILE__, __LINE__, ret);
             return OMPI_ERR_OUT_OF_RESOURCE;
         }
 
         ret = ompi_modex_recv(&mca_mtl_portals4_component.mtl_version,
                               procs[i], (void**) &id, &size);
         if (OMPI_SUCCESS != ret) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: ompi_modex_recv failed: %d\n",
-                        __FILE__, __LINE__, ret);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: ompi_modex_recv failed: %d\n",
+                                __FILE__, __LINE__, ret);
             return ret;
         } else if (sizeof(ptl_process_t) != size) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: ompi_modex_recv failed: %d\n",
-                        __FILE__, __LINE__, ret);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: ompi_modex_recv failed: %d\n",
+                                __FILE__, __LINE__, ret);
             return OMPI_ERR_BAD_PARAM;
         }
 
@@ -174,47 +174,10 @@ ompi_mtl_portals4_progress(void)
             case PTL_EVENT_PUT_OVERFLOW:
             case PTL_EVENT_ATOMIC:
             case PTL_EVENT_ATOMIC_OVERFLOW:
-                if (NULL != ev.user_ptr) {
-                    ptl_request = ev.user_ptr;
-                    ret = ptl_request->event_callback(&ev, ptl_request);
-                    if (OMPI_SUCCESS != ret) {
-                        opal_output(ompi_mtl_base_output,
-                                    "Error returned from target event callback: %d", ret);
-                        abort();
-                    }
-                }
-                break;
             case PTL_EVENT_REPLY:
             case PTL_EVENT_SEND:
             case PTL_EVENT_ACK:
-                if (NULL != ev.user_ptr) {
-                    ptl_request = ev.user_ptr;
-                    ret = ptl_request->event_callback(&ev, ptl_request);
-                    if (OMPI_SUCCESS != ret) {
-                        opal_output(ompi_mtl_base_output,
-                                    "Error returned from initiator event callback: %d", ret);
-                        abort();
-                    }
-                }
-                break;
-            case PTL_EVENT_PT_DISABLED:
-                /* do stuff - flow control */
-                opal_output(ompi_mtl_base_output, "Unhandled send flow control event.");
-                abort();
-                break;
-            case PTL_EVENT_AUTO_UNLINK:
-                break;
             case PTL_EVENT_AUTO_FREE:
-                if (NULL != ev.user_ptr) {
-                    ptl_request = ev.user_ptr;
-                    ret = ptl_request->event_callback(&ev, ptl_request);
-                    if (OMPI_SUCCESS != ret) {
-                        opal_output(ompi_mtl_base_output,
-                                    "Error returned from auto_free event callback: %d", ret);
-                        abort();
-                    }
-                }
-                break;
             case PTL_EVENT_SEARCH:
                 if (NULL != ev.user_ptr) {
                     ptl_request = ev.user_ptr;
@@ -226,10 +189,20 @@ ompi_mtl_portals4_progress(void)
                     }
                 }
                 break;
-            default:
-                opal_output(ompi_mtl_base_output,
-                            "Unknown event type %d (error: %d)", (int)ev.type, ret);
+            case PTL_EVENT_PT_DISABLED:
+                /* BWB: FIX ME: do stuff - flow control */
+                opal_output(ompi_mtl_base_output, "Unhandled send flow control event.");
                 abort();
+                break;
+            case PTL_EVENT_AUTO_UNLINK:
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "Unexpected auto unlink event");
+                break;
+            case PTL_EVENT_GET_OVERFLOW:
+            case PTL_EVENT_FETCH_ATOMIC:
+            case PTL_EVENT_FETCH_ATOMIC_OVERFLOW:
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "Unexpected event of type %d", ev.type);
             }
         } else if (PTL_EQ_EMPTY == ret) {
             break;
diff --git a/ompi/mca/mtl/portals4/mtl_portals4_component.c b/ompi/mca/mtl/portals4/mtl_portals4_component.c
index b649ab7611..9942ac2120 100644
--- a/ompi/mca/mtl/portals4/mtl_portals4_component.c
+++ b/ompi/mca/mtl/portals4/mtl_portals4_component.c
@@ -163,9 +163,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
     /* Initialize Portals and create a physical, matching interface */
     ret = PtlInit();
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlInit failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlInit failed: %d\n",
+                            __FILE__, __LINE__, ret);
         return NULL;
     }
 
@@ -176,27 +176,27 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                     NULL,
                     &ompi_mtl_portals4.ni_h);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlNIInit failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlNIInit failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
     /* Publish our NID/PID in the modex */
     ret = PtlGetId(ompi_mtl_portals4.ni_h, &id);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlGetId failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlGetId failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
     ret = ompi_modex_send(&mca_mtl_portals4_component.mtl_version,
                           &id, sizeof(id));
     if (OMPI_SUCCESS != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: ompi_modex_send failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: ompi_modex_send failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
@@ -209,9 +209,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                      ompi_mtl_portals4.queue_size,
                      &ompi_mtl_portals4.eq_h);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlEQAlloc failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlEQAlloc failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
@@ -222,9 +222,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                      REQ_SEND_TABLE_ID,
                      &ompi_mtl_portals4.send_idx);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlPTAlloc failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlPTAlloc failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
     ret = PtlPTAlloc(ompi_mtl_portals4.ni_h,
@@ -233,9 +233,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                      REQ_READ_TABLE_ID,
                      &ompi_mtl_portals4.read_idx);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlPTAlloc failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlPTAlloc failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
@@ -250,9 +250,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                     &md,
                     &ompi_mtl_portals4.zero_md_h ); 
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlMDBind failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlMDBind failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
@@ -274,18 +274,18 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
                       NULL,
                       &ompi_mtl_portals4.long_overflow_me_h);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlMEAppend failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlMEAppend failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
     /* attach short unex recv blocks */
     ret = ompi_mtl_portals4_recv_short_init(&ompi_mtl_portals4);
     if (OMPI_SUCCESS != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: short receive block initialization failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: short receive block initialization failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
@@ -297,9 +297,9 @@ ompi_mtl_portals4_component_init(bool enable_progress_threads,
     /* activate progress callback */
     ret = opal_progress_register(ompi_mtl_portals4_progress);
     if (OMPI_SUCCESS != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: opal_progress_register failed: %d\n",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: opal_progress_register failed: %d\n",
+                            __FILE__, __LINE__, ret);
         goto error;
     }
 
diff --git a/ompi/mca/mtl/portals4/mtl_portals4_probe.c b/ompi/mca/mtl/portals4/mtl_portals4_probe.c
index 8d3ed0d28b..39b6deedb6 100644
--- a/ompi/mca/mtl/portals4/mtl_portals4_probe.c
+++ b/ompi/mca/mtl/portals4/mtl_portals4_probe.c
@@ -95,9 +95,9 @@ ompi_mtl_portals4_iprobe(struct mca_mtl_base_module_t* mtl,
                       PTL_SEARCH_ONLY,
                       &request);
     if (PTL_OK != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlMESearch failed: %d",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlMESearch failed: %d",
+                            __FILE__, __LINE__, ret);
         return ompi_mtl_portals4_get_error(ret);
     }
 
diff --git a/ompi/mca/mtl/portals4/mtl_portals4_recv.c b/ompi/mca/mtl/portals4/mtl_portals4_recv.c
index 3bac167789..aa8c89459e 100644
--- a/ompi/mca/mtl/portals4/mtl_portals4_recv.c
+++ b/ompi/mca/mtl/portals4/mtl_portals4_recv.c
@@ -48,9 +48,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                              ptl_request->opcount, ev->hdr_data));
 
         if (ev->ni_fail_type != PTL_NI_OK) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: PTL_EVENT_PUT with ni_fail_type: %d",
-                        __FILE__, __LINE__, ev->ni_fail_type);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: PTL_EVENT_PUT with ni_fail_type: %d",
+                                __FILE__, __LINE__, ev->ni_fail_type);
             goto callback_error;
         }
 
@@ -60,8 +60,8 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
         ptl_request->super.super.ompi_req->req_status.MPI_TAG = 
             MTL_PORTALS4_GET_TAG(ev->match_bits);
         if (msg_length > ptl_request->delivery_len) {
-            opal_output(ompi_mtl_base_output, "truncate expected: %ld %ld", 
-                        msg_length, ptl_request->delivery_len);
+            opal_output_verbose(1, ompi_mtl_base_output, "truncate expected: %ld %ld", 
+                                msg_length, ptl_request->delivery_len);
             ptl_request->super.super.ompi_req->req_status.MPI_ERROR = MPI_ERR_TRUNCATE;
         }
 
@@ -84,9 +84,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                             &ptl_request->md_h);
             if (PTL_OK != ret) {
                 if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
-                opal_output(ompi_mtl_base_output,
-                            "%s:%d: PtlMDBind failed: %d",
-                            __FILE__, __LINE__, ret);
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "%s:%d: PtlMDBind failed: %d",
+                                    __FILE__, __LINE__, ret);
                 goto callback_error;
             }
 
@@ -99,9 +99,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                          ompi_mtl_portals4.eager_limit,
                          ptl_request);
             if (PTL_OK != ret) {
-                opal_output(ompi_mtl_base_output,
-                            "%s:%d: PtlGet failed: %d",
-                            __FILE__, __LINE__, ret);
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "%s:%d: PtlGet failed: %d",
+                                    __FILE__, __LINE__, ret);
                 PtlMDRelease(ptl_request->md_h);
                 if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
                 goto callback_error;
@@ -113,9 +113,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                                            ev->start,
                                            ev->mlength);
             if (OMPI_SUCCESS != ret) {
-                opal_output(ompi_mtl_base_output,
-                            "%s:%d: ompi_mtl_datatype_unpack failed: %d",
-                            __FILE__, __LINE__, ret);
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "%s:%d: ompi_mtl_datatype_unpack failed: %d",
+                                    __FILE__, __LINE__, ret);
                 ptl_request->super.super.ompi_req->req_status.MPI_ERROR = ret;
             }
             ptl_request->super.super.ompi_req->req_status._ucount = ev->mlength;
@@ -131,9 +131,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                              ptl_request->opcount, ptl_request->hdr_data));
 
         if (ev->ni_fail_type != PTL_NI_OK) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: PTL_EVENT_REPLY with ni_fail_type: %d",
-                        __FILE__, __LINE__, ev->ni_fail_type);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: PTL_EVENT_REPLY with ni_fail_type: %d",
+                                __FILE__, __LINE__, ev->ni_fail_type);
             PtlMDRelease(ptl_request->md_h);
             goto callback_error;
         }
@@ -154,9 +154,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                                        ptl_request->delivery_ptr, 
                                        ptl_request->super.super.ompi_req->req_status._ucount);
         if (OMPI_SUCCESS != ret) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: ompi_mtl_datatype_unpack failed: %d",
-                        __FILE__, __LINE__, ret);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: ompi_mtl_datatype_unpack failed: %d",
+                                __FILE__, __LINE__, ret);
             ptl_request->super.super.ompi_req->req_status.MPI_ERROR = ret;
         }
         PtlMDRelease(ptl_request->md_h);
@@ -171,9 +171,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                              ptl_request->opcount, ev->hdr_data));
 
         if (ev->ni_fail_type != PTL_NI_OK) {
-            opal_output(ompi_mtl_base_output,
-                        "%s:%d: PTL_EVENT_PUT_OVERFLOW with ni_fail_type: %d",
-                        __FILE__, __LINE__, ev->ni_fail_type);
+            opal_output_verbose(1, ompi_mtl_base_output,
+                                "%s:%d: PTL_EVENT_PUT_OVERFLOW with ni_fail_type: %d",
+                                __FILE__, __LINE__, ev->ni_fail_type);
             goto callback_error;
         }
 
@@ -183,8 +183,8 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
         ptl_request->super.super.ompi_req->req_status.MPI_TAG = 
             MTL_PORTALS4_GET_TAG(ev->match_bits);
         if (msg_length > ptl_request->delivery_len) {
-            opal_output(ompi_mtl_base_output, "truncate unexpected: %ld %ld %d", 
-                        msg_length, ptl_request->delivery_len, MTL_PORTALS4_IS_SHORT_MSG(ev->match_bits));
+            opal_output_verbose(1, ompi_mtl_base_output, "truncate unexpected: %ld %ld %d", 
+                                msg_length, ptl_request->delivery_len, MTL_PORTALS4_IS_SHORT_MSG(ev->match_bits));
             ptl_request->super.super.ompi_req->req_status.MPI_ERROR = MPI_ERR_TRUNCATE;
         }
 
@@ -209,9 +209,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                                             &max_data );
                 if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
                 if (ret < 0) {
-                    opal_output(ompi_mtl_base_output,
-                                "%s:%d: opal_convertor_unpack failed: %d",
-                                __FILE__, __LINE__, ret);
+                    opal_output_verbose(1, ompi_mtl_base_output,
+                                        "%s:%d: opal_convertor_unpack failed: %d",
+                                        __FILE__, __LINE__, ret);
                     goto callback_error;
                 }
             }
@@ -230,9 +230,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                              NULL,
                              0);
                 if (PTL_OK != ret) {
-                    opal_output(ompi_mtl_base_output,
-                                "%s:%d: PtlPut failed: %d",
-                                __FILE__, __LINE__, ret);
+                    opal_output_verbose(1, ompi_mtl_base_output,
+                                        "%s:%d: PtlPut failed: %d",
+                                        __FILE__, __LINE__, ret);
                     goto callback_error;
                 }
             }
@@ -261,9 +261,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                             &ptl_request->md_h);
             if (PTL_OK != ret) {
                 if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
-                opal_output(ompi_mtl_base_output,
-                            "%s:%d: PtlMDBind failed: %d",
-                            __FILE__, __LINE__, ret);
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "%s:%d: PtlMDBind failed: %d",
+                                    __FILE__, __LINE__, ret);
                 goto callback_error;
             }
 
@@ -278,9 +278,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
                          ev->mlength,
                          ptl_request);
             if (PTL_OK != ret) {
-                opal_output(ompi_mtl_base_output,
-                            "%s:%d: PtlGet failed: %d",
-                            __FILE__, __LINE__, ret);
+                opal_output_verbose(1, ompi_mtl_base_output,
+                                    "%s:%d: PtlGet failed: %d",
+                                    __FILE__, __LINE__, ret);
                 if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
                 PtlMDRelease(ptl_request->md_h);
                 goto callback_error;
@@ -290,9 +290,9 @@ ompi_mtl_portals4_recv_progress(ptl_event_t *ev,
         break;
 
     default:
-        opal_output(ompi_mtl_base_output,
-                    "Unhandled receive callback with event type %d",
-                    ev->type);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "Unhandled receive callback with event type %d",
+                            ev->type);
         return OMPI_ERROR;
     }
 
@@ -339,9 +339,9 @@ ompi_mtl_portals4_irecv(struct mca_mtl_base_module_t* mtl,
 
     ret = ompi_mtl_datatype_recv_buf(convertor, &start, &length, &free_after);
     if (OMPI_SUCCESS != ret) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlMEAppend failed: %d",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlMEAppend failed: %d",
+                            __FILE__, __LINE__, ret);
         return ret;
     }
 
@@ -380,9 +380,9 @@ ompi_mtl_portals4_irecv(struct mca_mtl_base_module_t* mtl,
                       &ptl_request->me_h);
     if (PTL_OK != ret) {
         if (NULL != ptl_request->buffer_ptr) free(ptl_request->buffer_ptr);
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: PtlMEAppend failed: %d",
-                    __FILE__, __LINE__, ret);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: PtlMEAppend failed: %d",
+                            __FILE__, __LINE__, ret);
         return ompi_mtl_portals4_get_error(ret);
     }
 
diff --git a/ompi/mca/mtl/portals4/mtl_portals4_send.c b/ompi/mca/mtl/portals4/mtl_portals4_send.c
index 12130e2e72..c4cbc83856 100644
--- a/ompi/mca/mtl/portals4/mtl_portals4_send.c
+++ b/ompi/mca/mtl/portals4/mtl_portals4_send.c
@@ -39,9 +39,9 @@ ompi_mtl_portals4_send_callback(ptl_event_t *ev, struct ompi_mtl_portals4_base_r
     assert(NULL != ptl_request->super.super.ompi_req);
 
     if (ev->ni_fail_type != PTL_NI_OK) {
-        opal_output(ompi_mtl_base_output,
-                    "%s:%d: send callback ni_fail_type: %d",
-                    __FILE__, __LINE__, ev->ni_fail_type);
+        opal_output_verbose(1, ompi_mtl_base_output,
+                            "%s:%d: send callback ni_fail_type: %d",
+                            __FILE__, __LINE__, ev->ni_fail_type);
         ptl_request->super.super.ompi_req->req_status.MPI_ERROR = OMPI_ERROR;
         ptl_request->super.super.completion_callback(&ptl_request->super.super);
         abort();