Telnet not connecting on Exchange 2010

Hi

I have a SBS2011 machine which has been running exchange quite happily for about a year.

I need a seperate application to be able to send mail through exchange but it is failing.

I have tried to telnet but it is blocked.

What i can't quite get is how email is fine but i can't telnet as port 25 must be open to receive mail.

Cheers
LVL 1
George-Asked:
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George-Author Commented:
PS, I can connect localy "Telnet 127.0.0.1 25" just not over the network.

Firewall is disbled.
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Simon Butler (Sembee)ConsultantCommented:
SBS 2011 blocks connects to port 25 internally by default.
If you have an application that needs to send through Exchange, you should create a seperate recieve connector that is restricted to just that IP address.
I wouldn't recommend changing the existing connectors as you could but the block back when using another tool within SBS.

Simon.
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George-Author Commented:
i have created a new receive connector on the server IP port 25 and the IP of the machine i want to send from already.
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Simon Butler (Sembee)ConsultantCommented:
You also shouldn't disable the Windows firewall. There is no need to do that, as the correct exclusions will already be in place.
Ensure that no AV software on either the server or the workstation are getting in the way. McAfee for example will block local SMTP traffic.

Simon.
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prashant_greatCommented:
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George-Author Commented:
Hi

It was McAfee on the machine sending the mail (trying to telnet from) that was blocking port 25 (Prevent Mass mailng worms).  When I allowed this I could telnet but it failed with error 550 5.7.1 Unable to relay when trying to send over telent.

I followed these settings:
http://exchangeserverpro.com/how-to-configure-a-relay-connector-for-exchange-server-2010/
and all is sweet now.

Thanks for your input guys.
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George-Author Commented:
Fixed
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