On 2014-08-27, Konstantin Boyandin <[email protected]> wrote: > Hello, > > Could someone suggest better way to prevent Exim backscatter? Exim 4.72 > is in use. There are two solutions considered:
backscatter is bounce notifications sent in response to emails sent to domains for which you are MX. > 1. Set up proper ACL to prevent backscatter (verifying the sender before > doing so) > 2. Create 'catchall' router, intercepting all unrouteable addresses (I > think this is better solution). You should know which addresses ae legal for domains where you are MX. doing recipient callouts and cut-thru routing are acceptable for domains where you are MX. sender verification is basically impossible, but greylisting, SPF, and DBLs are all options. > If I need to provide Exim configuration file, please let me know what > parts I may omit/mangle prior to sending here. domain, user names, names and IP addresses are fair game. but to avoid confusion your mangling function should be a bijection and be applied consistently. try to be obvious. -- umop apisdn -- ## 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/
