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You could use the interal connector if it's not Internet facing, you would need to add the appropriate network segment or individual IP addresses that you want to allow to relay SMTP traffic.<br />
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You can also set the authentication method to &quot;Externally Secured&quot; and allow anonymous connections.<br />
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See the following link<br />
<a href="http://www.google.com/url?sa=t&source=web&cd=2&ved=0CB0QFjAB&url=http%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fbb232021.aspx&ei=tvPSTeCFNOXV0QH5rdCLDA&usg=AFQjCNEB0qtFwrbLBhmzhut88r14XmYgkQ&sig2=BeK0jRoZYpY6bQsfImlQzw" rel="ugc">http://www.google.com/url?sa=t&source=web&cd=2&ved=0CB0QFjAB&url=http%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fbb232021.aspx&ei=tvPSTeCFNOXV0QH5rdCLDA&usg=AFQjCNEB0qtFwrbLBhmzhut88r14XmYgkQ&sig2=BeK0jRoZYpY6bQsfImlQzw</a><br />

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You could use the interal connector if it's not Internet facing, you would need to add the appropriate network segment or individual IP addresses that you want to allow to relay SMTP traffic.

You can also set the authentication method to "Externally Secured" and allow anonymous connections.

See the following link
http://www.google.com/url?sa=t&source=web&cd=2&ved=0CB0QFjAB&url=http%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fbb232021.aspx&ei=tvPSTeCFNOXV0QH5rdCLDA&usg=AFQjCNEB0qtFwrbLBhmzhut88r14XmYgkQ&sig2=BeK0jRoZYpY6bQsfImlQzw [http://www.google.com/url?sa=t&source=web&cd=2&ved=0CB0QFjAB&url=http%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fbb232021.aspx&ei=tvPSTeCFNOXV0QH5rdCLDA&usg=AFQjCNEB0qtFwrbLBhmzhut88r14XmYgkQ&sig2=BeK0jRoZYpY6bQsfImlQzw]


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I have a 2010 Hub Transport Server that is not facing the Internet (Internal Only). &nbsp;I want to enable SMTP Relay for Internal devices and printers. &nbsp;Should I create a new connector on the Hub Transport Server &nbsp;or should I use the Default Connector on the Hub Transport Server for SMTP Relay for the internal devices?
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I have a 2010 Hub Transport Server that is not facing the Internet (Internal Only).  I want to enable SMTP Relay for Internal devices and printers.  Should I create a new connector on the Hub Transport Server  or should I use the Default Connector on the Hub Transport Server for SMTP Relay for the internal devices?

SMTP Relay Exchange 2010

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.