The first thing I'll do is answer your last (concrete) question: you asked what modules to use. There's a module called (conveniently) CGI, which is just for CGI scripts. Since you seem to be new to CGI, that module may be the way for you to go. (There are other options, of course, but CGI is a popular one.) There are also various books and online tutorials for using it, which is a good reason to consider it. (I don't use it, because I roll my own, but I also read RFC documents; if you're not that kind of geek, you may want to use the module.)

For sending mail, you may want to consider Mail::Mailer or Mail::Send. These are considered better than formmail.pl, partly for reasons of security, and partly for reasons of coding style.

$;=sub{$/};@;=map{my($a,$b)=($_,$;);$;=sub{$a.$b->()}}
split//,".rekcah lreP rehtona tsuJ";$\=$ ;->();print$/
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