100 strange email cron job

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.5

Hello
Today I recieved about 100 emails for every minute with object:
Cron <mtyvffgb@out1> lynx -source " dominio.it/index.php?option=com_hikashop&ctrl=cron " > /dev/null

and text:

Looking up www.dominio.it
Making HTTP connection to www.dominio.it
Alert!: Unable to connect to remote host.

lynx: Can't access startfile www.dominio.it/index.php?option=com_hikashop&ctrl=cron

Why that??
what do you think
Thanks
Frank

NOw the text of the message is :
<div class="alert alert-info alert-block"><button type="button" class="close" data-dismiss="alert">×</button><p>Cron di HikaShop cominciato a 2017-01-10 22:24</p></div>
I deleted the cron in the cpanel couse it kept sanding mails every minute

Frank

Yes I understand your point
They sayd me to use after the comand /dev/null, do you think that it can help you??
YOu know just now I saw that in your documentation at the end of the comand there is /dev/null too but I am not sure if I used before or not.
However I rebuilt the cron so I will see what will be going on

Thanks Frank

You know the strange is that before I didn't have any problem with lynx, all of a sudden I received all those emails.
Now I made again the cron with lynx and I dont have problem again.
What do yuo think, for your experience , why sudden I recieved the emails??

Frank