I have an exchange 2003 server which I know very little about. Nothing on my end has changed but occaasionally we receive a phone call from some of our vendors saying they tried to send an email and receive the following msg:
Failed to connect to SMTP host @@@@@.com becasue remote system no longer responding. This strange thing is that this does not happen for all messages. Can someone provide some guidance as to how I go about trouble shooting this (in simplest terms possible)?
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