Avoiding a module causing a 'security attack!'...

I'm using the Inviter module which allows a member to select contact's email addresses from social networks and email systems with an invite to your site.

All fine and dandy when using the module with Cron job in the off position. However, when I go live with this, my server will not thank me for it. So I've activated Cron job to drip feed the emails to recipients. Sounds sensible enough, I thought.

However, this action takes the email, turns it into an error report detailing that a "security attack was stopped!".

Any ideas how to allow this action and avoid it being flagged as a security risk? Thanks!