[web] dns diag spf record syntax link updated (#4175)

Added old one on new domain name

Signed-off-by: Kristian Feldsam <feldsam@gmail.com>

data/web/inc/ajax/dns_diagnostics.php

@@ -69,7 +69,7 @@ if (isset($_SESSION['mailcow_cc_role']) && ($_SESSION['mailcow_cc_role'] == "adm
   }
 
   // Init records array
-  $spf_link = '<a href="https://en.wikipedia.org/wiki/Sender_Policy_Framework" target="_blank">SPF Record Syntax</a><br />';
+  $spf_link = '<a href="http://www.open-spf.org/SPF_Record_Syntax/" target="_blank">SPF Record Syntax</a><br />';
   $dmarc_link = '<a href="https://www.kitterman.com/dmarc/assistant.html" target="_blank">DMARC Assistant</a>';
 
   $records = array();