One of the things I can think of, is the auth_type is wrong. I showed a 'LOGIN' auth_type, but there is a choice of PLAIN, LOGIN, or CRAM-MD5.

Also try turning on Debug and see if you can catch the error. 

my $smtp = Net::SMTP_auth->new($Servername, Port=>$Port, Debug => 1 );

[download]

You also might want to capture the transaction with ethereal or tcpick

Did you ever consider the other system dosn't support SMTP auth? Or the port it runs it on is different from the working system? Many systems run auth on port 587, but they can put it wherever they want.

I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re^3: Net::SMTP - Authentication Problem by zentara
in thread Net::SMTP - Authentication Problem by vi_srikanth

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