diff --git a/colloscope/icalexport.py b/colloscope/icalexport.py
index 9c3ae44..2d8af49 100644
--- a/colloscope/icalexport.py
+++ b/colloscope/icalexport.py
@@ -9,26 +9,36 @@ from colloscope.models import *
 LOCAL_TZ = "Europe/Paris"
 
 
-def to_calendar(etudiant, periode):
+def emailize(nom, prenom=None):
+    if prenom is not None:
+        return "{}.{}@example.com" \
+            .format(
+            prenom.replace(" ", "_").lower(),
+            nom.replace(" ", "_").lower()
+        )
+    else:
+        return "{}@example.com" \
+            .format(nom.replace(" ", "_").lower())
 
+
+def to_calendar(etudiant, periode):
     p = path.abspath('./static/Base_Calendar.ics')
 
     with open(p) as f:
         cal = Calendar.from_ical(f.read())
 
-
     rotations = Rotation.objects \
-            .filter(groupes__membres=etudiant) \
-            .select_related("creneau__periode__classe__lycee") \
-            .select_related("creneau__matiere") \
-            .select_related("creneau__colleur") \
-
+        .filter(groupes__membres=etudiant) \
+        .select_related("creneau__periode__classe__lycee") \
+        .select_related("creneau__matiere") \
+        .select_related("creneau__colleur") \
+ \
     for rotation in rotations:
         event = Event()
 
         summary = f"Colle {rotation.creneau.matiere} ({rotation.creneau.colleur})"
         event.add("summary", summary)
-        
+
         start = rotation.datetime()
         fin = start + rotation.creneau.duree
 
@@ -36,7 +46,6 @@ def to_calendar(etudiant, periode):
         event.add("dtend", fin, parameters={"tzid": LOCAL_TZ})
         event.add("dtstamp", datetime.now())
         event.add("uid", str(uuid4()))
-        
 
         event.add("location", f"{rotation.creneau.salle} ({rotation.creneau.periode.classe.lycee})")
         event.add("categories", "COLLE-" + str(rotation.creneau.matiere))
@@ -44,15 +53,15 @@ def to_calendar(etudiant, periode):
         description = f"Groupes: {','.join(str(groupe) for groupe in rotation.groupes.all())}"
         event.add("description", description)
 
-        organizer = vCalAddress("mailto:unknown@mp2i-vms.fr")
+        organizer = vCalAddress(f"mailto:{emailize(rotation.creneau.colleur.nom)}")
         organizer.params["cn"] = vText(str(rotation.creneau.colleur))
         organizer.params["role"] = vText("Colleur")
         event.add("organizer", organizer)
 
         for e in rotation.groupe_effectif():
-            attendee = vCalAddress("mailto:unknown@mp2i-vms.fr")
-            attendee.params["role"] = vText("Etudiant")
+            attendee = vCalAddress("mailto:{emailize(e.nom, prenom=e.prenom)}")
             attendee.params["cn"] = vText(str(e))
+            attendee.params["role"] = vText("Etudiant")
 
             event.add("attendee", attendee, encode=0)