Mail::Sender for one does not require any priviledges to intall it - just make sure it is in the right path and go ahead and use it. Since you have no telnet access, you will have to add

use lib 'path/to/where/you/stuck/Mail::Sender'
[download]

at the top of your script. Make sure you have a Maildirectory with Sender.pm inside it, then use the lib line above to point to the directory in which the Mail directory resides.