Add reject_unauth_pipelining to block spammer
While I assume most bluk mailer nowadays use delays and stuff, you will likely always find people who do not know the trick and will try to send as fast as possible new mails. Taken from gluster config.
While I assume most bluk mailer nowadays use delays and stuff, you will likely always find people who do not know the trick and will try to send as fast as possible new mails. Taken from gluster config.