--On 26 October 2006 16:43:19 +0200 [EMAIL PROTECTED] wrote:
> [EMAIL PROTECTED] schrieb: >> Hi >> >> Having searched the exim mail archives and not found my problem there I >> thought of asking the experts. >> >> I am postmaster for a local company mail server (it is running Exim >> 4.63) that receives its e-mail from our company mail relay which does >> the virus checking of the e-mail as it arrives into the company. >> >> We have a lot of e-mail arriving for users that have left the company >> and so I created a reject-list file which is checked in the >> acl_smtp_rcpt acl so that these e-mails are rejected early which saves >> on downloading them and running them through Spamassassin (use sa-exim). >> >> This works fine for most of this type of spam. >> >> But lately, an increasing percentage of this spam is arriving with the >> sender spoofed to be [EMAIL PROTECTED] (i.e. me) and when Exim issues >> a deny because the recipient has left I then get an e-mail from the >> postmaster of our company mail relay sent to [EMAIL PROTECTED] to >> inform me that the e-mail to [EMAIL PROTECTED] failed because of unknown >> user! >> >> >> How can I reject this type of spam without getting the e-mail from >> postmaster of our company mail relay? > > Paul, > > your local MTA is doing fine, but your company mail relay needs to do > recipient verification for the domains it is relaying to, instead of > accepting mail for recipients that don't exist. Otherwise you will > always get their collateral spam. That's what he's doing. The collateral spam probably wasn't originally aimed at his users. Paul, if you *never* send email from the postmaster address, then you can safely reject messages with null sender that are addressed to postmaster - but do this in the data acl otherwise you may fall foul of sender verification callouts. > > Patrick Eisenacher -- Ian Eiloart IT Services, University of Sussex -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
