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KKCS asked:
Ø Can anyone suggest a way to solve this problem?
SMTP mail uses a simple in-band control mechanism and FTP-like ASCII primitives.
You should be able to login to the build machine and telnet to the SMTP port on the mail server and emulate an MUA by hand. That will allow you to debug the issue very quickly. You state that you are getting connection refused, so I’ll bet you either have a firewall issue, a nonstandard SMTP port, or an MTA unknown-source-blocking problem.
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