Fix CyberMail payload format: use flat string for from/to fields

includes/email.php

@@ -58,8 +58,8 @@ class Email {
 
     public function send(string $to, string $subject, string $html, ?string $text = null, array $options = []): array {
         $payload = array_merge([
-            'from'    => ['email' => $this->fromEmail, 'name' => getSetting('cybermail_from_name', "Tom's Java Jive")],
-            'to'      => [['email' => $to]],
+            'from'    => $this->fromEmail,
+            'to'      => $to,
             'subject' => $subject,
             'html'    => $html,
         ], $options);