diff --git a/app/validators/typoed_email_validator.rb b/app/validators/typoed_email_validator.rb
index 4a4d7620..d4f4b84a 100644
--- a/app/validators/typoed_email_validator.rb
+++ b/app/validators/typoed_email_validator.rb
@@ -28,6 +28,7 @@ class TypoedEmailValidator < ActiveModel::EachValidator
       iclooud.com
       iclould.com
       icluod.com
+      protonail.com
       xn--gmail-xk1c.com
       yahooo.com
       ☺gmail.com
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 642f844d..f0e3803c 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -96,6 +96,7 @@ RSpec.describe User, type: :model do
     include_examples "invalid email", "fritz.fantom@iclooud.com"
     include_examples "invalid email", "fritz.fantom@iclould.com"
     include_examples "invalid email", "fritz.fantom@icluod.com"
+    include_examples "invalid email", "fritz.fantom@protonail.com"
     include_examples "invalid email", "fritz.fantom@xn--gmail-xk1c.com"
     include_examples "invalid email", "fritz.fantom@yahooo.com"
     include_examples "invalid email", "fritz.fantom@☺gmail.com"