--- /dev/null
+<?php
+
+namespace Drupal\Core\Field\Plugin\Field\FieldFormatter;
+
+use Drupal\Core\Field\FormatterBase;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Url;
+
+/**
+ * Plugin implementation of the 'email_mailto' formatter.
+ *
+ * @FieldFormatter(
+ * id = "email_mailto",
+ * label = @Translation("Email"),
+ * field_types = {
+ * "email"
+ * }
+ * )
+ */
+class MailToFormatter extends FormatterBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function viewElements(FieldItemListInterface $items, $langcode) {
+ $elements = [];
+
+ foreach ($items as $delta => $item) {
+ $elements[$delta] = [
+ '#type' => 'link',
+ '#title' => $item->value,
+ '#url' => Url::fromUri('mailto:' . $item->value),
+ ];
+ }
+
+ return $elements;
+ }
+
+}