Exchange 2013 - best way to configure internal software/scanners/etc. to send e-mails

In Exchange 2007, we were able to set up a receive connector with anonymous authentication that allowed internal software and hardware (printers, scanners, event notification processes) to send e-mails. It is my understanding that with Exchange 2013, creating a similar receive connector using port 25 may end up breaking Exchange. I tried to configure it to work with the default options in Exchange for port 25 but that didn't work either.

One option seems to be to use another port, but some of these simpler services will only work with port 25.

What is the best way to configure Exchange for these services to properly work?
ruhkusAsked:
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Simon Butler (Sembee)ConsultantCommented:
Nothing has changed in Exchange 2013.
Create a new connector but make sure the scope settings are correct so that your connector is used.

Simon.
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
What I recommend doing is setup SMTP services on an IIS server and create a remote domain for your Exchange.  Setup IP based relay for your devices and this way you could always change the SMTP configuration or relay list without worrying about breaking anything in Exchange.
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Gareth GudgerCommented:
Simon is correct. You can set up a Receive Connector like you did in 2007 for anonymous application relay. If you need it to relay externally it does require a little more PowerShell. But nothing has changed since 2007.
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ruhkusAuthor Commented:
Thanks. My question comes due to posts such as this one - link

As far as I can tell, I should just need to specify it as a front-end transport receive connector and not hub transport (since multi-role server) and it should work fine, but I wanted to make sure.
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Gareth GudgerCommented:
Yes. It needs to be a FrontEnd.

I would follow this article from Paul Cunningham. This is the way I always follow.
http://exchangeserverpro.com/exchange-2013-configure-smtp-relay-connector/
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