How to forward local mail to external address?

[Magicloud Magiclouds <magicloud.magiclouds@gmail.com>]

Hi,

  By default, many tools like cron will send mails to local, like magicloud@localhost.

  Now I want these mails to be relayed to my company mail address. So I do not have to configure all tools to send mail directly to my company address. I used to have it on another host, but I forgot how to do it.

  I am using exim4.

  Thanks.

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