diff --git a/src/Model/Geometry/Reach.py b/src/Model/Geometry/Reach.py
index 7458f3b1eff25849ab42f03e7823a4f3aee09fe4..782556532d374f8c58c2bdc0ea3453cf1a7d3839 100644
--- a/src/Model/Geometry/Reach.py
+++ b/src/Model/Geometry/Reach.py
@@ -364,6 +364,26 @@ class Reach(SQLSubModel):
         else:
             return 0.0
 
+    def inter_profiles_kp(self):
+        res_kp = [self.profile(0).kp]
+
+        profiles = iter(self.profiles)
+        previous = next(profile)
+
+        for profile in profiles:
+            prev = previous.kp
+            curr = profile.kp
+
+            diff = abs(previous.kp - profile.kp)
+
+            new = previous.kp + (diff / 2.0)
+            res_kp.append(new)
+
+            previous = profile
+
+        res_kp.append(self.profile(len(self) - 1).kp)
+        return res_kp
+
     # Sediment Layers
 
     def get_sl(self):
diff --git a/src/Solver/RubarBE.py b/src/Solver/RubarBE.py
index a6df9d3377eacc6db852e15a9ea01e34977bd2a9..66386c11802944acfadddb189a76880e1ff3560d 100644
--- a/src/Solver/RubarBE.py
+++ b/src/Solver/RubarBE.py
@@ -195,3 +195,40 @@ class RubarBE(CommandLineSolver):
                         )
 
                     ind += 1
+
+    def _export_mail(self, study, repertory, files, qlog, name="0"):
+        if qlog is not None:
+            qlog.put("Export MAIL file")
+
+        with open(
+                os.path.join(
+                    repertory, f"mail.{name}"
+                ), "w+"
+        ) as f:
+            for edge in study.river.enable_edges():
+                lm = len(edge) + 1
+
+                f.write(f"{lm:>13}")
+
+                # TMAIL
+                ind = 0
+                for inter in edge.reach.inter_profiles_kp():
+                    f.write(f"{inter:15.3f}")
+
+                    ind += 1
+                    if ind % 3 == 0:
+                        f.write("\n")
+
+                # New line (if last iteration do not finish with new
+                # line)
+                if ind % 3 != 0:
+                    f.write("\n")
+
+                # XTMAIL
+                ind = 0
+                for profile in edge.reach.profiles:
+                    f.write(f" {profile.kp:15.3f} ")
+
+                    ind += 1
+                    if ind % 3 == 0:
+                        f.write("\n")