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can not establish a connection because the target machine, expressly rejected the connection SMTP EXCHANGE 2010

limmontreefree
on
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Last Modified: 2012-05-12
Hello everybody.
I have an Exchange 2010 and a TMG server.
I'm trying to use SMTP port 587, but in the TMG when i audit the rule i have the error:
"can not establish a connection because the target machine, expressly rejected the connection"
the target machine is the Exchange server,
How can i review the SMTP configuration in the Exchange?

Thanks
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