Notify user cycle email (#1035)

* notify user about a cycle email

* prettify notification detail page

email_handler.py

@@ -550,6 +550,18 @@ def handle_email_sent_to_ourself(alias, from_addr: str, msg: Message, user):
     # link available for 6 days as it gets deleted in 7 days
     refused_email_url = refused_email.get_url(expires_in=518400)
 
+    Notification.create(
+        user_id=user.id,
+        title=f"Email sent to {alias.email} from its own mailbox {from_addr}",
+        message=Notification.render(
+            "notification/cycle-email.html",
+            alias=alias,
+            from_addr=from_addr,
+            refused_email_url=refused_email_url,
+        ),
+        commit=True,
+    )
+
     send_email_at_most_times(
         user,
         ALERT_SEND_EMAIL_CYCLE,

templates/dashboard/notification.html

@@ -18,9 +18,8 @@
         {{ notification.message | safe }}
       </div>
 
-      <hr>
-
-      <form method="post" class="mt-3" onsubmit="return confirm('This operation is not reversible, please confirm');">
+      <form method="post" class="float-right mt-3"
+            onsubmit="return confirm('This operation is not reversible, please confirm');">
         <button class="btn btn-outline-danger">Delete</button>
       </form>
     </div>

templates/notification/cycle-email.html

@@ -0,0 +1,10 @@
+<div>
+  An email was sent to your alias <b>{{ alias.email }}</b> from its own mailbox <b>{{ from_addr }}</b>.
+</div>
+<div>
+  SimpleLogin doesn't send this email back to your mailbox as it would be refused or hidden anyway by your email
+  service.
+</div>
+<div>
+  So no worries, there's nothing you need to do :).
+</div>