fix: now you can use SSL with port 465

But it is not recommended.

Author: kenjis

system/Email/Email.php

@@ -1870,9 +1870,13 @@ protected function SMTPConnect()
 
         $ssl = '';
 
+        // Connection to port 465 should use implicit TLS (without STARTTLS)
+        // as per RFC 8314.
         if ($this->SMTPPort === 465) {
             $ssl = 'tls://';
-        } elseif ($this->SMTPCrypto === 'ssl') {
+        }
+        // But if $SMTPCrypto is set to `ssl`, SSL can be used.
+        if ($this->SMTPCrypto === 'ssl') {
             $ssl = 'ssl://';
         }