If you just want to wrap the paragraphs at a certain line width, have a look at Template::Plugin::Wrap, which does just that.
Otherwise, if that's not what you're looking for, could you rephrase your question below? Are you looking for information on how to send the mail itself, or suggestions on post-processing the template output, or ... ?
Next step: this template is intended for use in generating an email report from a cron job. How do I make my template generate wrapped paragraphs suitable for that use?