diff --git a/src/server/game/Groups/Group.cpp b/src/server/game/Groups/Group.cpp
index 0832f7ee2..ee1b94fe9 100644
--- a/src/server/game/Groups/Group.cpp
+++ b/src/server/game/Groups/Group.cpp
@@ -1525,7 +1525,9 @@ void Group::CountTheRoll(Rolls::iterator rollI, Map* allowedMap)
                     else
                     {
                         uint32 mailOnFull = sWorld->getIntConfig(CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY);
-                        if (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup()))
+                        // Only mail when bags are genuinely full. Unique/max-count failures must
+                        // leave the item on the corpse so it can be re-rolled or freely looted.
+                        if (msg == EQUIP_ERR_INVENTORY_FULL && (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup())))
                         {
                             item->is_looted = true;
                             roll->getLoot()->NotifyItemRemoved(roll->itemSlot);
@@ -1607,7 +1609,9 @@ void Group::CountTheRoll(Rolls::iterator rollI, Map* allowedMap)
                         else
                         {
                             uint32 mailOnFull = sWorld->getIntConfig(CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY);
-                            if (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup()))
+                            // Only mail when bags are genuinely full. Unique/max-count failures must
+                            // leave the item on the corpse so it can be re-rolled or freely looted.
+                            if (msg == EQUIP_ERR_INVENTORY_FULL && (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup())))
                             {
                                 item->is_looted = true;
                                 roll->getLoot()->NotifyItemRemoved(roll->itemSlot);