Maybe try the Net::SMTP_auth module? 
#!/usr/bin/perl
use warnings;
use strict;
use Net::SMTP_auth;

my $smtp = Net::SMTP_auth->new('zentara.zentara.net');
$smtp->auth('LOGIN', 'z', 'ztest');

$smtp->mail('z@zentara.zentara.net');
$smtp->to('zentara@zentara.zentara.net');

$smtp->data();
$smtp->datasend("To: postmaster\n");
$smtp->datasend("\n");
$smtp->datasend("A simple test message\n");
$smtp->dataend();

$smtp->quit;

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

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

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