asked on 10/10/2011

SBS 2011 Cannot Send email to external domains

I just set up a new SBS 2011 server and am having trouble getting external email to send. I have found that the messages are stuck in the mail queue with a status of : "Retry"
The Last Error is the same for all which is: "451 4.4.0 primary target ip address responded with 421 4.2.1 unable to connect"
My ISP blocks port 25 so I changed the Send Connector port from 25 to 2525
I also added DNS forwarders of: 8.8.8.8, and 8.8.4.4 (Google Public DNS)

Please help me resolve this issue.
Thanks!

Microsoft Server OS SBS Exchange

Last Comment

jmolhava

10/12/2011

stanley_stars

10/10/2011

Verify that the settings of your Default Internet SMTP Send Connector is correct in the Organization Configuration --> Hub Transport and is enabled.

ASKER CERTIFIED SOLUTION

Cliff Galiher

10/10/2011

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jmolhava

10/10/2011

ASKER

@stanley - There is only one Send Connector which was setup by the wizard during install.

The FQDN is correct

The address space is SMTP with "*" for domain

Network is set to use (DNS) MX records to route mail. (no other options selected here)

Server tab is correct

SuperTaco

10/10/2011

is the exchange 2003 server (or SBS 2003) still up? if so, try using the Exchange 2003 machine as a smart host on the 2010 send connector.

jmolhava

10/10/2011

ASKER

@cliff - That makes sense so I will have to go with a static IP option from our ISP. We are on a business line of service, but the static IP is an optional feature. I had changed the port because of another post elsewhere that talked about making that change. Thanks for clearing that up for me.
I will be making the change tomorrow and will close this issue out assuming that it resolves things.

@SuperTaco - The previous server was not an SBS server. Previously, email has been hosted through another company.

libran2011

10/11/2011

Moreover to get the default settings on Connectors you can run Fix My network wizard which will configure the send connectors to the default.

Thanks

jmolhava

10/12/2011

ASKER

Thanks for clarifying for me what was required. I did get a static IP with port 25 unblocked and now all is working well.