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Solved Hosting my own Externally accessible SMTP server / relay.

Lenovo Thinkserver ts140 5u rack tower s...
July 28, 2015 at 12:28:03
Specs: Windows Server 2012R2 Essentials, 12GB

I currently manage several hundred different clients Multi Functional Devices (MFD's), most of which utilise the scan-to-email function. This simply entails inputting the relevant SMTP details in the MFD's web interface and it works ...

Up until now I have been using my hosts relay and setting up the devices to use a generic 'scan@' email address hanging off one of my domains to relay the email. In this case, the host is Fasthosts.

Now, as you can appreciate, not only is this insecure, this is somewhat unreliable and I am pretty sure as my customer base increases as does the load on the relay, the service is somewhat degrading, probably due to Fasthosts spam filters etc. This has led me to believe I need to host my own SMTP relay which is externally accessible so I can configure my clients MFD's to relay scan-to-email via my own SMTP relay.

My question is, how do I do this?

Do I simply setup SMTP in IIS6 for example and make this server externally accessible by the usual methods, or do I need to delve into MX records and DNS etc, linking one of my domains for use with the relay.

Any information however big or small would be much appreciated. I am not new to this, but have never come across so many SMB's who do not know / are not able to provide their own SMTP details for their MFD's, therefore relying on me for a solution to their scan-to-email woes!

Thanks in advance.

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July 28, 2015 at 14:35:53
✔ Best Answer
As well as setting up the mail server you will need an MX record in the DNS zone for your domain pointing to that server. Be aware that setting up a mail server and ensuring that it is secure is not a trivial operation and you would be well advised to hire a consultant who understands these things to help you. Otherwise there is a very real risk that your mail server will get listed as an open relay or a source of Spam, meaning that many external mail servers will reject mail that you try to send.

What I am saying is that unless you really understand what you are doing (and, without wishing to be rude, you wouldn't be asking this question if you did) you may well end up with a setup that is less secure and less reliable than your current arrangements.

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