I'm working on a registration page using perl/cgi. Part of the registration process involves sending the user an email with a confirmation code. In my tests, this email frequently gets dumped into the spam folder! Here's a snippet to illustrate what I'm doing to send the email: 

use strict;

my $sendmail = "/usr/sbin/sendmail -t";

my $from = 'me@mycompany.com';
my $to = 'you@yourcompany.com';
my $reply_to = 'me@mycompany.com';
my $subject = "Subject goes here";
my $body = "Body goes here.";

open(SENDMAIL, "|$sendmail") or die "Cannot open $sendmail: $!";
print SENDMAIL "From: $from\n";
print SENDMAIL "To: $to\n";
print SENDMAIL "Reply-to: $reply_to\n";
print SENDMAIL "Subject: $subject\n";
print SENDMAIL "Content-type: text/plain\n\n";
print SENDMAIL $body;
close(SENDMAIL);

[download]

I apologize if this seems off-topic, but perl is used a lot for this type of thing, and I'm hoping someone here knows a tip or trick (maybe some obscure field to use in the header?) that would make a short confirmation email look more legitimate, and less like spam.

Thanks!

In reply to How can I prevent my email from looking like spam? by scorpio17

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