Your envelope adress doesnt match the from adress. This is the main reason why mails are regarded as spam. The background is: The envelope adress (in your case [email protected]) isn’t really visible to the user. Its just used by mailservers to return error mails. Historically because they are more relevant to the admin than to … Read more
I very much share your take on CAPTCHA. I’ll list what I have been able to detect so far, for my own detection script, with similar goals. It’s only partial, as they are many more headless browsers. Fairly safe to use exposed window properties to detect/assume those particular headless browser: window._phantom (or window.callPhantom) //phantomjs window.__phantomas … Read more
A simple trick is to create a honeypot field: html <!– within your existing form add this field –> <input type=”text” id=”website” name=”website”/> css /*in your css hide the field so real users cant fill it in*/ form #website{ display:none; } php //in your php ignore any submissions that inlcude this field if(!empty($_POST[‘website’])) die();
Have you read this? So You’d Like to Send Some Email (Through Code) In a nutshell: Make sure the computer sending the email has a Reverse PTR record Configure DomainKeys Identified Mail in your DNS and code Set up a SenderID record in your DNS
My company does professional e-mail marketting campaigns (through strongmail servers) we send thousands of (sollicited) emails a day to all kinds of addresses. The problem you are facing is that you have no authority. You could just be some spammer trying to send loads of spam. The thing you need to do is: Add unsubscribe … Read more
Old question, but I thought I’d chime in, as I’ve been maintaining a module for Drupal (Honeypot), which uses the Honeypot spam prevention method alongside a time-based protection (users can’t submit form in less than X seconds, and X increases exponentially with each consecutive failed submission). Using these two methods, I have heard of many, … Read more
Recaptcha has an excellent capture based email protection. You can see it implemented at the bottom of any page in my website using the Site Feedback link.
I actually find that a simple Honey Pot field works well. Most bots fill in every form field they see, hoping to get around required field validators. http://haacked.com/archive/2007/09/11/honeypot-captcha.aspx If you create a text box, hide it in javascript, then verify that the value is blank on the server, this weeds out 99% of robots out … Read more
In my experience the currently most effective methods are honeypot input fields that are made invisible to users via CSS (best use several different methods, such as visibility:hidden, setting a size of 0 pixels, and absolute positioning far outside the browser window); if they’re filled anyway you can assume it’s a spambot. This blog describes … Read more
You must to add a needle headers: Sample code : $headers = “From: [email protected]\r\n”; $headers .= “Reply-To: [email protected]\r\n”; $headers .= “Return-Path: [email protected]\r\n”; $headers .= “CC: [email protected]\r\n”; $headers .= “BCC: [email protected]\r\n”; if ( mail($to,$subject,$message,$headers) ) { echo “The email has been sent!”; } else { echo “The email has failed!”; } ?>