You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allpages apcontinue="Configurar_outlook_para_Iphone" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="202" ns="0" title="Backup Conta Zimbra" />
      <p pageid="242" ns="0" title="Bloquear/Permitir recebimento de email - Zimbra" />
      <p pageid="265" ns="0" title="Buscar por emails - Zimbra" />
      <p pageid="312" ns="0" title="Como Configurar o Cloud ESWEB" />
      <p pageid="5" ns="0" title="Configurar Outlook" />
      <p pageid="194" ns="0" title="Configurar Thunderbird" />
      <p pageid="251" ns="0" title="Configurar Thunderbird - Zimbra" />
      <p pageid="169" ns="0" title="Configurar VPN no Windows" />
      <p pageid="170" ns="0" title="Configurar Zimbra no Outlook" />
      <p pageid="23" ns="0" title="Configurar outlook para Android" />
    </allpages>
  </query>
</api>