I've got a mailing list script. It works well, and has a confirmation feature to make sure it's ther right email address. The problem is that after time people tend to change email address which results in emails coming back as undeliverable.
How can I update the script so that it sees the returned emails, and removes them from the mailing list?
I had a go at finding a solution, but it seems that some emails are returned to the sending address while others seem to end up in the default account for the server, while others end up in the root inbox.
I need a solution that is workable on shareded hosting.