RHSBL bcc_maps on rcpt-to for outbound spam checks
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From: Ram on 13 Jul 2010 09:56 We provide smtp relay services for a lot of remote mailservers There are still some inadvertent spam outbreaks , either because the remote mail server has some weak username/password account. Or because there is some Micro$$oft windows desktop with a virus spewing spams We do partial outbound spam scan + ratelimits , that somehow seems to mitigate the issue. But outbound spam scanning is not perfect and is very heavy ( and without tangible benefits to explain extra h/w to the management :-) ) I feel there is a better way of dealing with this issue. I have a huge list of parked domains ( 1M entries) , or domains that never receive any mails. This list can be fed to my rbldnsd server. If any client sends a mail to these parked domains , I should be able to bcc the mails to a central program for analysis. I dont want to reject the mails using reject_rhsbl_recipient ( my list may not be that perfect :-) ) I thought of using recipient_bcc_maps but having huge recipient_bcc_maps files on all my servers does not seem a good idea. Anyway most of these map entries will *never* get used in normal times. Thanks Ram |