Date: Sat, 5 Dec 2009 14:02:26 -0800 From: "Andrew Danneffel" <adanneffel (at mark) atomation.com> Subject: [coba-e:16179] No such user here To: <coba-e (at mark) bluequartz.org> Message-Id: <026f01ca75f6$a20ee450$4001a8c0@Maxwell> X-Mail-Count: 16179Hi there,My Blue Quartz server is constantly being hammered with email to users =that do not exist on the server (I believe they are referred to NDRs). =The maillog lists thousands and thousands of these "No such user here" =errors each day. Strangely the vast majority of them are to two =domains, each which start with "a". I don't believe the server is =automatically sending out responses to these senders as this has been =happening for some time and the server is not blacklisted from what I =can see. I understand that these messages are from spammers and that =the sender email addresses are spoofed.I am wondering what (if anything) can be done to prevent the server from =processing and logging all of these useless messages. I suspect all of =these mail requests are generating significant data transfer. Is it =simply a fact of life or can some component of the mail system be =optimized to stop it? Thanks,Andrew16179_2.html (attatchment)(tag is disabled)