Show error notice when email is sent from unauthorized email

[MAILPOET-1787]

lib/Config/Menu.php

@@ -73,6 +73,7 @@ class Menu {
     $this->subscribers_over_limit = $subscribers_feature->check();
     $this->checkMailPoetAPIKey();
     $this->checkPremiumKey();
+    $this->checkFromEmailAuthorization();
 
     add_action(
       'admin_menu',
@@ -836,6 +837,13 @@ class Menu {
     $this->premium_key_valid = $checker->isPremiumKeyValid($show_notices);
   }
 
+  function checkFromEmailAuthorization(ServicesChecker $checker = null) {
+    if (self::isOnMailPoetAdminPage()) {
+      $checker = $checker ?: new ServicesChecker();
+      $checker->isFromEmailAuthorized(true);
+    }
+  }
+
   function getLimitPerPage($model = null) {
     if ($model === null) {
       return Listing\Handler::DEFAULT_LIMIT_PER_PAGE;