The best scenario is be able to classify the type of bounce: soft, hard… what we use is BounceStudio. You need to compile it and add the php libraries… not hard at all. You have the free and paid version of that product once we detect the kind of bounce we use PEAR::MAIL::MIME to search … Read more
Let’s start with a simple example. Let’s say you have an email list, that is going to send out the following RFC2822 content. From: <[email protected]> To: <[email protected]> Subject: Super simple email Reply-To: <[email protected]> This is a very simple body. Now, let’s say you are going to send it from a mailing list, that implements VERP … Read more
You should check with SMTP. That means you have to connect to that email’s SMTP server. After connecting to the SMTP server you should send these commands: HELO somehostname.com MAIL FROM: <[email protected]> RCPT TO: <[email protected]> If you get “<[email protected]> Relay access denied” that means this email is Invalid. There is a simple PHP class. You … Read more