diff --git a/ldap_frontend/__init__.py b/ldap_frontend/__init__.py
index d5d8fa7..204c96a 100644
--- a/ldap_frontend/__init__.py
+++ b/ldap_frontend/__init__.py
@@ -103,7 +103,7 @@ def selfservice(ldap):
                             request.form["givenName"],
                             request.form["sn"],
                         ),
-                        "mail": request.form["mail"],
+                        "external-mail": request.form["external-mail"],
                     },
                 )
                 flash(gettext("user data was updated"))
diff --git a/ldap_frontend/templates/selfservice.html b/ldap_frontend/templates/selfservice.html
index c7d243a..e3fe419 100644
--- a/ldap_frontend/templates/selfservice.html
+++ b/ldap_frontend/templates/selfservice.html
@@ -37,9 +37,9 @@
                     </div>
 
                     <div class="row mb-3">
-                        <label for="mail" class="form-label col-sm-2">{% trans email %}e-mail address{% endtrans %}</label>
+                        <label for="external-mail" class="form-label col-sm-2">{% trans email %}e-mail address{% endtrans %}</label>
                         <div class="col-sm-10">
-                            <input type="email" name="mail" id="mail" value="{{ CURRENT_USER["mail"]|e }}" required class="form-control">
+                            <input type="email" name="external-mail" id="external-mail" value="{{ CURRENT_USER["external-mail"]|e }}" required class="form-control">
                         </div>
                     </div>
 
diff --git a/ldap_frontend/translations/de/LC_MESSAGES/messages.po b/ldap_frontend/translations/de/LC_MESSAGES/messages.po
index 946bcaa..6a9684c 100644
--- a/ldap_frontend/translations/de/LC_MESSAGES/messages.po
+++ b/ldap_frontend/translations/de/LC_MESSAGES/messages.po
@@ -109,8 +109,8 @@ msgid "given name"
 msgstr "Vorname"
 
 #: templates/selfservice.html:40
-msgid "e-mail address"
-msgstr "E-Mail-Adresse"
+msgid "external e-mail address"
+msgstr "Externe E-Mail-Adresse"
 
 #: templates/selfservice.html:46
 msgid "Update"