Hi, I've been tinkering with this for about an hour now trying to figure out why it won't catch intentional mistakes that I throw in. What I'm doing is trying to validate an email address, with something like this: 
if ($MailTo !~ /\@*\./) {
#set a kill flag
#print a message
}

[download]
So, to clear up the seemingly random characters up there, that's a / to open it, and escaped @ sign, a *, an escaped ., then another / to close it. Essentially I'm looking for an @ sign then a dot. On the console, this line works great, catches mistakes and everything. But when I run it through a web page as a CGI script it doesn't catch it unless I don't put anything in the field. Any ideas? Here's all of the code, just to see if anybody catches a minor mistake in my code: 
use Net::SMTP;
use CGI ':standard';

#Get parameters from http string#
my $ServerName = param('server');
my $MailFrom   = param('from');
my $MailTo     = param('to');
my $Subject    = param('subject');
my $Content    = param('content');

print "Content-type: text/html\n\n";
print "<html>\n
       <head>\n
       <title>Mail Results</title>\n
       </head>\n
       <body>\n";

my $kill = 0;

if (!($MailFrom =~/\@*\./)) {

    $kill = 1;
    print "Invalid return address in From box.
";

}

if (!($MailTo !~/\@*\./)) {
    $kill = 1;
    print "Invalid destination address.  Please notify the webmaster o
+f this problem by sending an email to 

wvhs-web\@charter.net.
";

}

if ($kill == 1) {

    die("One or more errors have occurred which prevent the script fro
+m continuing further.
");

} else {

    $smtp = Net::SMTP->new($ServerName, Debug => 0);
    die "Couldn't connet to server: $!" unless $smtp;

    $smtp->mail($MailFrom);
    $smtp->to($MailTo);
    $smtp->data();
    $smtp->datasend("To:  $MailTo\n");
    $smtp->datasend("From:  $MailFrom\n");
    $smtp->datasend("Subject:  $Subject\n");
    $smtp->datasend("\n");
    $smtp->datasend("$Content\n\n");
    $smtp->dataend();
    $smtp->quit();

    print "Mail Sent Successfully\n
\n";

}

print  "</body>\n
        </html>";

[download]
Thanks, Eric

edited by ybiC: Balanced <code> and <readmore> tags, retitle from "Regex problem"

In reply to email address validation regexp by wallyweezle

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.