SendGrid Emails Getting Rejected as Spam
Answer recommended by Twilio Collective
spam
Preventing bot form submission
This is one problem that a lot of people have encountered. As user166390 points out in the comments, the bot can just submit information directly to the server, bypassing the javascript (see simple utilities like cURL and Postman). Many bots are capable of consuming and interacting with the javascript now. Hari krishnan points out the … Read more
I am creating an email spammer, for an outstanding cause [closed]
I have a few suggestions for you. The first one relies on The Onion Router also known as Tor. Since you are crossing to the dark side, why not also take a look into the darknet? Take a look at this list of Tor email providers. If you have your own email server that can … Read more
How do I prevent mails sent through PHP mail() from going to spam? [duplicate]
You must to add a needle headers: Sample code : $headers = “From: myplace@example.com\r\n”; $headers .= “Reply-To: myplace2@example.com\r\n”; $headers .= “Return-Path: myplace@example.com\r\n”; $headers .= “CC: sombodyelse@example.com\r\n”; $headers .= “BCC: hidden@example.com\r\n”; if ( mail($to,$subject,$message,$headers) ) { echo “The email has been sent!”; } else { echo “The email has failed!”; } ?>
Blocking comment spam without using captcha [closed]
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
how to check if a string looks randomized, or human generated and pronouncable?
I guess you could think of something like that if you could restrict yourself to pronounceable sounds in english. For me (I am French), words like szczepan or wawrzyniec are unpronounceable and certainly have a certain randomness. But they are actually Polish first names (meaning steven and lawrence)…
How to spamproof a mailto link?
JavaScript remains one of the best mailto obfuscator. For users with JavaScript disabled you may want to substitute the mailto link with a link to a contact form. The following is a popular JavaScript anti spam email obfuscator: http://www.jottings.com/obfuscator/ There is also a php version of the above to be able to generate obfuscated emails … Read more
Should I use the Reply-To header when sending emails as a service to others?
I tested dkarp’s solution with gmail and it was filtered to spam. Use the Reply-To header instead (or in addition, although gmail apparently doesn’t need it). Here’s how linkedin does it: Sender: messages-noreply@bounce.linkedin.com From: John Doe via LinkedIn <member@linkedin.com> Reply-To: John Doe <John.Doe@gmail.com> To: My Name <My.Name@gmail.com> Once I switched to this format, gmail is … Read more