In an older post we talked about checking the validity of an email address. Now let’s make a php function to automate this task. We can use this type of validation to check for example if a user is using a correct address when registering for a service.
You can use telnet to check if an email is valid. You can actually send emails via telnet, but we’ll stick to checking for now. Remember that this is not a string validation but a complete check with the mail server if the user is valid. For this example we will use [email protected]