Just a quick couple of notes

use CGI;
This is great you're already ahead of most new CGI programmers

print MAIL "To: $form{'usermail'}\n";
this right here, let's you become a spam portal. You have just allowed anyone who can find your page send email to anyone including UCE. You should decide if this user email is really necessary. If it is necessary preset a message; don't take a message from a form value, this will at least make it useless for spammers.

Use taint checking, to validate and clean your form data. Never trust form data.

Check out Ovid's excellent "Web Programming Using Perl" course.



grep
Mynd you, mønk bites Kan be pretti nasti...

In reply to Re: Insecurities in my scripting by grep
in thread Insecurities in my scripting by sulfericacid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.