We want to block all emails sent from spamming servers like Microsoft ESMTP Mail Service.
In ACL HELO how can one match the data in the HELO/EHLO line ? I want to match 'Microsoft ESMTP MAIL Service' and then drop or reject the connection. 220 galsrv1.galvatech.local Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Wed, 5 Sep 2012 03:29:41 +1000 220 adstudio.co.za Microsoft ESMTP MAIL Service, Version: 6.0.3790.4675 ready at Tue, 4 Sep 2012 19:31:48 +0200 M$ ESMTP MAIL Service does not recognise 550 error codes sent by Exim. M$ thinks 550 means "try again to send the unwanted junk". The worse mail abusers, in my experience, use Microsoft ESMTP MAIL Service. We get about 150 mail attempts every day from each of the defective Microsoft ESMTP MAIL Service servers, day after day. Their owners and ISPs are ineffective at halting the abuse. Thank you. -- Paul. England, EU. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
