title: Create both IPv4 and IPv6 SPF record
body: <p>Right now I have SPF IP4 and IP6 as two separate records, but IPv6 is not being recognized by Gmail. Should I merge them? It looks like this currently. How should it be configured?</p>
  
  <pre><code>  A   3600     0  78.46.138.249
   MX   3600    10  mx.zohomail.com
   MX   3600    20  mx2.zohomail.com
   NS   3600     0  ns1.loopia.se
   NS   3600     0  ns2.loopia.se
  TXT   3600     0  "v=spf1 ip4:78.46.138.249 ~all"
  TXT    300     0  "v=spf1 ip6:2a01:4f8:d16:1355::2 +all"
  </code></pre>
  
  <p>GMail:</p>
  
  <pre><code>Received-SPF: softfail (google.com: domain of transitioning info@dadilja.rs does not designate 2a01:4f8:d16:1355::2 as permitted sender) client-ip=2a01:4f8:d16:1355::2;
  </code></pre>