Exchange 2010 Tracking/Relaying

We have an AS400 Iseries  that sends auto responses such as Invoices, PO's , and order confirmations. They go out every night and users have the ability to send them from their g GUI.   We use our Exchange 2010 server to relay those messages. i have the relay connector set up and it was working fine. However, we had a issue and emails were not sent for 2 days. I was unaware that it was not relaying and the messages were not going out. I deleted the connector and recreated it. I am not worried about the connector so much as the monitoring of SMTP traffic from the I series. How can I monitor this on Exchange, perhaps see a log of connection attempts on the SMTP port that failed from that server\ip-address?  Thanks
reyhanpatAsked:
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tshearonCommented:
You can use exchange management shell and do the following:

Set-ReceiveConnector "Connector_name" -ProtocolLoggingLevel Verbose

Protocol logging is disable by default so after setting it then look here:

 <drive>:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\Logs\ProtocolLog

 You can open in excel and sort by IP.
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reyhanpatAuthor Commented:
Thanks, Sorry I was out of town. I enabled the connector and located a few PowerShell scripts that should help me get the data from the logs.
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