Terry L. Inzauro schrieb: > List, > > I operate a backup mx for one of my customers. In doing so, I have run into > an issue where I must accept all email regardless > of weather or not the messages is destined for a valid email account in my > customers email system (which is MS Exchange 2003). > > I thought about asking my customer is they would export a list of email > addresses for which they want backup MX service for > so I can place that in a relay_recipient_map, but that process requires > ongoing admin time and might not appeal to them.
so they have accepted to get forged mail > > The majority of the junk mail I am seeing is in the form of From: u...@domain > and RCPT: u...@domain which is obviously > forged. Would a header_check be the way to go here in order to match and > discard the junk mail in this case? If so, what > would the pcre check look like? i wouldnt start solving this with header checks you might use clamav-milter with sanesecurity antispam,antipish signatures , if you really have to accept all mails, set it up to quarantaine in hold the spam found mails , let the customer pay your manual inspection of the holded mail, (alternative let it reject on income smtp level which normally is fine with any law problems, consider to use rbls if possible ) after all, change the customer *g > > > I understand that legitimate users wouldn't be able to send themselves email, > but that fine with me. > > > > best regards, > > > _Terry -- Best Regards MfG Robert Schetterer Germany/Munich/Bavaria
