Disable Cron notifications

Good morning, I hope my English is understandable, I’ve been using your plugin for a long time until it’s starting to give me problems.

Personally I think it is a good plugin, I see it simple and practical, no complications, that’s why I use it and would like to continue using it.

The problem is that every one that is sent by emails to my subscribers I receive an email telling me that this amount of emails has been sent. the content is more or less is this.

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SUBJET: Cron URL has been triggered successfully
CONTENT: Cron URL has been triggered successfully on 2017-12-05 14:25:03 for the mail El Vividor: 5 Canciones Para Dedicar A Un Amigo/a. And it sent mail to 5 recipient.
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In the beginning I did not care, however this has become very dangerous, because it seems that the IP of my domain is being added to the blacklists, because now I do not receive these notification notifications from CRON, likewise some of my users tells me that even in hotmail, not even other types of emails arrive.

It is more likely that the problem is because from my IP and domain, too many emails are sent consecutively, the problem is not sending news to my subscribers, as this is configured to send 5 emails every 5 minutes.

I think the problem is the emails that I, as an administrator, receive in my mail, I mean the message that I have put above.

To solve this, I would like to deactivate the notifications sent to me by email.

In the area of plugin configuration I do not find that option, so I tried to look for the PHP code to be able to deactivate it directly from there but it was more complex than I thought.

Could you help me see how to disable this notification?

Regards!

The page I need help with: [log in to see the link]