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SMTP Server send only within my domain

Posted on 2014-09-25
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Last Modified: 2014-10-12
I'd like to take my existing SMTP server that is within my network, and limit where it can send emails. I only want emails to go out to addresses that are within my domain.

Currently, anyone with access to the server can send to any email in the world. Moving forward I only want emails to go to user@mydomain.com. All other emails should be ignored.

I'm currently using Windows server 2012 with Microsoft's SMTP module.

Is there a way to set this up with my current solution or is there another product that will cover this?

All help is appreciated.

Thank you,

John Caspary
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Question by:JohnMan777
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Expert Comment

by:Mohammed Khawaja
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This is due to the fact that you have allowed the IP ranges to relay.  If you remove the IP addresses from the relay list, it will only relay to local domain only.
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Author Comment

by:JohnMan777
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Unfortunately, I don't have my own exchange server, but instead use Office365.  Because of this, I must allow the traffic to leave the company intranet.

Is there another way to make this work?
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Accepted Solution

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JohnMan777 earned 0 total points
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I figured out a solution. Microsoft helped me set up a rule in Office365 to restrict to internal use only. This was done based on the senders email address.
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Author Closing Comment

by:JohnMan777
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Microsoft helped me out.
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