I usually don't work with NET::SMTP, but rather send mail via sendmail (of course UNIX only solution) : 
  open(MAIL, "| /usr/sbin/sendmail -t") or die $!;
  print MAIL "From: xxx@xxx.xxx\nTo: qwe@aaa.com\nSubject: your subjec
+t\n\nBody here";

[download]

This is generally much faster than NET::SMTP. And will work magically with port number etc ;)

But of course this will work only locally

In reply to Re: Sending SMTP mail on other than port 25 by asdfgroup
in thread Sending SMTP mail on other than port 25 by grinder

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