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Change from POP3 Connector to SMTP for SBS2008 - Exchange 2007

Posted on 2010-01-08
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Last Modified: 2012-06-27
On a SBS2008, we want to change from POP3 connector to SMTP mail reception.
We have opened port 25 on the firewall to be forwarded to the SBS2008 box, but there is no response to a telnet from the outside.
On SBS2003 that worked without doing anything, is there something to do on the SBS2008 in Exchange maybe ?
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Question by:djrc
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by:Glen Knight
ID: 26208785
so what do you get if you telnet from a computer outside of your network to the public IP address of your network?
Find out what the public ip address is by going to http://whatsmyip.org

Double check you have forwarded port 25 from your router/firewall to the internal IP address of your exchange server.
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by:djrc
ID: 26208944
Thanks.
I just get a timeout error.
I've double check the forward and enabled loggin on the router and I cannot see my external telnet request coming in.
So I'm going to check if my ISP has this blocked, I haven't requested the MX record change and they may have a firewall policy to block port 25...
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Glen Knight earned 2000 total points
ID: 26208955
The chances are it's blocked by your ISP.

Can you check by running the following:

telnet outgoing.gkvirtualdomain.co.uk 25

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