Problem email with cron job server

Hi
On my server I have active cron job and disable wp cron…. afther active your plugin I receive many email like this:

<strong style=”color:lightgreen;”>OK https://www.barpalummo.it/cannoli_siciliani_crema_bianca-2/ (desktop)<br><strong style=”color:lightgreen;”>OK https://www.barpalummo.it/paste_di_mandorla_classiche_1-4/ (desktop)<br><strong style=”color:lightgreen;”>OK https://www.barpalummo.it/paste_di_mandorla_classiche-2/ (desktop)<br><strong style=”color:lightgreen;”>OK https://www.barpalummo.it/foto_cassata_tagliata-2/ (desktop)<br><strong style=”color:lightgreen;”>OK https://www.barpalummo.it/?attachment_id=37458#main (desktop)<br><strong style=”color:lightgreen;”>OK https://www.barpalummo.it/?attachment_id=37457#main (desktop)<br><br>6 page have been cached<br><br>

Why?

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