We hate spam. We hate it so much, we developed our own filtering techniques to get rid of it. We know you hate spam too, so now we are offering this service to anyone with a domain name. You can filter for any email server at any location as long as you have control of the MX records for your domain. You point your domains to us, give us your email server IP, and nearly all of your spam is gone.
We never discard or bounce any email. One of two things happen, the email is delivered to you or it is refused by the server and delivered right back to the sending server. This means it doesn't bounce, or create backscatter. If for some reason an email is mistakenly blocked, the error includes instructions on how to repair the problem or contact our support.