diff --git a/app/lib/email_checker.rb b/app/lib/email_checker.rb
index c2cbe3536..e2d2d5222 100644
--- a/app/lib/email_checker.rb
+++ b/app/lib/email_checker.rb
@@ -627,6 +627,8 @@ class EmailChecker
     return { success: true } if similar_domains.empty?
 
     { success: true, email_suggestions: email_suggestions(parsed_email:, similar_domains:) }
+  rescue Mail::Field::IncompleteParseError
+    return { success: false }
   end
 
   private
diff --git a/spec/controllers/email_checker_controller_spec.rb b/spec/controllers/email_checker_controller_spec.rb
index 4572c2cd4..685bd5de9 100644
--- a/spec/controllers/email_checker_controller_spec.rb
+++ b/spec/controllers/email_checker_controller_spec.rb
@@ -35,5 +35,13 @@ describe EmailCheckerController, type: :controller do
         expect(body).to eq({ success: false })
       end
     end
+
+    context 'incomplete' do
+      let(:params) { { email: 'bikram.subedi81@' } }
+      it do
+        expect(response).to have_http_status(:success)
+        expect(body).to eq({ success: false })
+      end
+    end
   end
 end