php email verification
Just sent out 2200 emails to users on a mailing list we had and got about 300 bounces.
Think I might allocate some time to write an email verification plugin for phplist, whereby you select a list and it’ll run through every email address and it will firstly check the format using a regex then use getmxrr() to check if an MX record for that domain exists.
Also, it might be possible using an fsockopen() on port 25 to see if the user exists on that server?
Will use these links below to try and get something running for PHPList.
http://www.webdigi.co.uk/blog/wp-content/uploads/2009/01/smtpvalidateclassphp.txt
http://www.devshed.com/c/a/PHP/Email-Address-Verification-with-PHP/5/