inform user when an alias can't be created when a directory is disabled

app/alias_utils.py

@@ -8,6 +8,7 @@ from app.email_utils import (
     send_cannot_create_directory_alias,
     send_cannot_create_domain_alias,
     can_create_directory_for_address,
+    send_cannot_create_directory_alias_disabled,
 )
 from app.errors import AliasInTrashError
 from app.extensions import db
@@ -66,6 +67,12 @@ def try_auto_create_directory(address: str) -> Optional[Alias]:
             send_cannot_create_directory_alias(dir_user, address, directory_name)
             return None
 
+        if directory.disabled:
+            send_cannot_create_directory_alias_disabled(
+                dir_user, address, directory_name
+            )
+            return None
+
         try:
             LOG.d("create alias %s for directory %s", address, directory)
 

app/config.py

@@ -324,6 +324,9 @@ ALERT_MAILBOX_IS_ALIAS = "mailbox_is_alias"
 
 AlERT_WRONG_MX_RECORD_CUSTOM_DOMAIN = "custom_domain_mx_record_issue"
 
+# alert when a new alias is about to be created on a disabled directory
+ALERT_DIRECTORY_DISABLED_ALIAS_CREATION = "alert_directory_disabled_alias_creation"
+
 # <<<<< END ALERT EMAIL >>>>
 
 # Disable onboarding emails

app/email_utils.py

@@ -37,6 +37,7 @@ from app.config import (
     URL,
     LANDING_PAGE_URL,
     EMAIL_DOMAIN,
+    ALERT_DIRECTORY_DISABLED_ALIAS_CREATION,
 )
 from app.dns_utils import get_mx_domains
 from app.extensions import db
@@ -172,6 +173,28 @@ def send_cannot_create_directory_alias(user, alias_address, directory_name):
             directory=directory_name,
         ),
     )
+
+
+def send_cannot_create_directory_alias_disabled(user, alias_address, directory_name):
+    """when the directory is disabled, new alias can't be created on-the-fly.
+    Send user an email to notify of an attempt
+    """
+    send_email_with_rate_control(
+        user,
+        ALERT_DIRECTORY_DISABLED_ALIAS_CREATION,
+        user.email,
+        f"Alias {alias_address} cannot be created",
+        render(
+            "transactional/cannot-create-alias-directory-disabled.txt",
+            name=user.name,
+            alias=alias_address,
+            directory=directory_name,
+        ),
+        render(
+            "transactional/cannot-create-alias-directory-disabled.html",
+            name=user.name,
+            alias=alias_address,
+            directory=directory_name,
         ),
     )
 

templates/emails/transactional/cannot-create-alias-directory-disabled.html

@@ -0,0 +1,20 @@
+{% extends "base.html" %}
+
+{% block content %}
+  {{ render_text("Hi " + name) }}
+
+  {% call text() %}
+    An email has been sent to the alias <b>{{ alias }}</b> that would be created automatically as you own the directory <b>{{ directory }}</b>
+  {% endcall %}
+
+  {% call text() %}
+    As <b>on-the-fly alias creation is disabled</b> on this directory, the alias isn't created.
+  {% endcall %}
+
+  {% call text() %}
+    If you aren't aware of this alias, that probably means someone has discovered about your directory and is abusing it.
+  {% endcall %}
+
+
+  {{ render_text('Thanks, <br />SimpleLogin Team.') }}
+{% endblock %}

templates/emails/transactional/cannot-create-alias-directory-disabled.txt

@@ -0,0 +1,10 @@
+Hi {{name}}
+
+An email has been sent to the alias {{alias}} that would be created automatically as you own the directory {{directory}}.
+
+As the directory has the on-the-fly alias creation disabled, the alias isn't created.
+
+If you aren't aware of this alias, that probably means someone has discovered about your directory and is abusing it.
+
+Best,
+SimpleLogin team.