Hi, > Simon Billis wrote on Thu, 4 Feb 2010 13:28:04 -0000: > > > I am attempting to stop any > > backscatter that these servers cause by only accepting mail for > specific > > users at domain or for domains with a catch-all account. > > I believe milter-ahead or smf-sav can be used for this. > > Kai Indeed as can Scam-backscatter, but I'm attempting to not load the backend mailserver with connections if at all possible, due to the number of emails that are received on the antispam machines... (I know that they cache the results of the lookups, but spammers like to send to dictionaries ;-) ) Thanks for the suggestion though :-) Simon.