Forgive me if this has been asked (or point me thusly): My postfix box is getting e-mails where dirtbagspam...@whatever.com sends to someothercrapaddr...@whereverelse.com and uses a valid e-mail address on my server for the return, so I get a non-delivery e-mail from the someothercrapaddr...@whateverelse.com mail server to the client (virtual hosted) on my server. How can I block clients on my box from getting these e-mails or discard these automatically, will postfix do this? Apparently the spammers just got a valid e-mail my client had somewhere like on a website and just used it as a return address for the spam operation, or are there other scenarios that would likely cause this? My box isn't blacklisted, has the right RDNS, and isn't open-relaying.
Best, Cameron
