+ Platal::assert(!is_null($user), 'User cannot be null.');
+
+ return !$user->checkPerms(User::PERM_MAIL) && $new_email != $user->forlifeEmail();
+}
+
+function format_email_alias($email)
+{
+ if ($user = User::getSilent($email)) {
+ return $user->forlifeEmail();
+ }
+ if (isvalid_email($email)) {
+ return $email;
+ }
+ return null;
+}
+
+function add_to_list_alias($email, $local_part, $domain, $type = 'alias')
+{
+ $email = format_email_alias($email);
+ if (is_null($email)) {
+ return false;
+ }