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Secure SMTP relay, SBS 2011, Exchange 2010

Posted on 2011-03-16
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Last Modified: 2012-05-11
Hello. I have a SBS 2011 enviornment, which uses Exchange 2010. All users check their email using PCs and Droid phones -- everything works fine.

We are adding an addition POP3 email address to each user's PC/Droid. These pop accounts (new.com) are being hosted by a third party. This third party is not offering any SMTP relay services. We would like to use our "in-house" SBS2011/Exchange 2010 server for SMTP relay.

How can I configure the Droid phones to SMTP relay securely while on the road (i.e. reply to emails as user@new.com)

Thank you
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Question by:landymas
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by:landymas
ID: 35156336
so.. i'm guessing there is just no solution to this problem? Any work around?


I need remote device to have exchange 2011 account, and also a pop3 account. Must be able to send/receive on both.
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Alan Hardisty earned 500 total points
ID: 35167433
The problem with using SMTP whilst on the move is that most ISP's including mobile phone providers will probably block port 25 as an Anti-Spam measure.

If you want to configure your server - you will need to use port 587 and configure a new Receive Connector using this port and configured for all IP Addresses, using Integrated Windows Authentication, then you will need to open up the port on your firewall and forward it to the server.

On your PC's / Droids - you will then need to configure the mail program to send via your server on port 587.
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