[CentOS] Alias for sending email messages from root

I have run into what can only be described as a farce but one that is outside my control and which I need fixed.

I am informed that my cell phone service provider, Bell Canada, will not allow any email messages from a user id 'root' to pass through their email to sms text gateway. Now, I send alerts out from cron and other system monitoring software and these all go out as root@host.domain.tld.

Is there any way to configure the outgoing address to be something else? Or do I have to rename the root user to get around this nonsensical, and utterly useless, restriction imposed by my provider?