inform user when his alias has been transferred

app/dashboard/views/alias_transfer.py

@@ -5,6 +5,7 @@ from itsdangerous import Signer
 from app.config import ALIAS_TRANSFER_SECRET
 from app.config import URL
 from app.dashboard.base import dashboard_bp
+from app.email_utils import send_email, render
 from app.extensions import db
 from app.log import LOG
 from app.models import (
@@ -48,6 +49,21 @@ def transfer(alias, new_user, new_mailboxes: [Mailbox]):
     if not alias.original_owner_id:
         alias.original_owner_id = alias.user_id
 
+    # inform previous owner
+    old_user = alias.user
+    send_email(
+        old_user.email,
+        f"Alias {alias.email} has been received",
+        render(
+            "transactional/alias-transferred.txt",
+            alias=alias,
+        ),
+        render(
+            "transactional/alias-transferred.html",
+            alias=alias,
+        ),
+    )
+
     # now the alias belongs to the new user
     alias.user_id = new_user.id
 

templates/emails/transactional/alias-transferred.html

@@ -0,0 +1,21 @@
+{% extends "base.html" %}
+
+{% block content %}
+  {% call text() %}
+    <h1>
+      {{ alias.email }} has been transferred.
+    </h1>
+  {% endcall %}
+
+  {% call text() %}
+    Your (previously) alias {{  alias.email }} has been received by another user.
+  {% endcall %}
+
+  {% call text() %}
+    Best, <br/>
+    SimpleLogin Team.
+  {% endcall %}
+
+{% endblock %}
+
+

templates/emails/transactional/alias-transferred.txt

@@ -0,0 +1,6 @@
+{{ alias.email }} has been transferred.
+
+Your (previously) alias {{  alias.email }} has been received by another user.
+
+Best,
+SimpleLogin Team.