This video who how to create autoresponders with DirectAdmin.
Let me say this first. Autoresponders are very bad. It can get the server blacklisted very quickly.
When a spammer sends you email likely he is not using his own email address. He is either using an email address that is totally fake or he is using some else’s email address.
So let’s think about the logic of this. When the spammer sends you email from somebody else’s email address, the autoreponder sends an email back to that address which belongs to someone else. When that person gets the email what is he going to do? That’s right report it as spam. Who gets the blame, the last server that send the spam, YOUR server. So YOUR server will get blacklisted not the spammer’s.