diff --git a/app/email_utils.py b/app/email_utils.py
index 3a8cbceb..3a205ff6 100644
--- a/app/email_utils.py
+++ b/app/email_utils.py
@@ -115,7 +115,7 @@ def send_cannot_create_directory_alias(user, alias, directory):
             directory=directory,
         ),
         _render(
-            "cannot-create-alias-directory.txt",
+            "cannot-create-alias-directory.html",
             name=user.name,
             alias=alias,
             directory=directory,
@@ -134,7 +134,10 @@ def send_cannot_create_domain_alias(user, alias, domain):
             "cannot-create-alias-domain.txt", name=user.name, alias=alias, domain=domain
         ),
         _render(
-            "cannot-create-alias-domain.txt", name=user.name, alias=alias, domain=domain
+            "cannot-create-alias-domain.html",
+            name=user.name,
+            alias=alias,
+            domain=domain,
         ),
     )
 
diff --git a/templates/emails/cannot-create-alias-directory.html b/templates/emails/cannot-create-alias-directory.html
new file mode 100644
index 00000000..48e28bb6
--- /dev/null
+++ b/templates/emails/cannot-create-alias-directory.html
@@ -0,0 +1,8 @@
+Hi {{name}} <br><br>
+
+An email has been sent to the alias <b>{{alias}}</b> that would be created automatically as you own the directory <b>{{directory}}</b>. However as your plan is no longer premium, this creation cannot happen.<br><br>
+
+Please upgrade to premium plan in order to use this feature.<br><br>
+
+Best,<br>
+SimpleLogin team.
diff --git a/templates/emails/cannot-create-alias-domain.html b/templates/emails/cannot-create-alias-domain.html
new file mode 100644
index 00000000..cf21d1ca
--- /dev/null
+++ b/templates/emails/cannot-create-alias-domain.html
@@ -0,0 +1,8 @@
+Hi {{name}} <br><br>
+
+An email has been sent to the alias <b>{{alias}}</b> that would be created automatically as you own the domain <b>{{domain}}</b>. However as your plan is no longer premium, this creation cannot happen.<br><br>
+
+Please upgrade to premium plan in order to use this feature.<br><br>
+
+Best,<br>
+SimpleLogin team.