I tried to test this module by running the example given on this page.
http://search.cpan.org/~friedo/Net-SMTP-IPMM-0.03/lib/Net/SMTP/IPMM.pm
When I run the page, I got following error.
Use of uninitialized value in concatenation (.) or string at
/usr/lib/perl5/site_perl/5.8.0/Net/SMTP/IPMM.pm line 33.
I am new to perl and don't know why this happens.