* James B. Byrne <byrn...@harte-lyne.ca>: > Without going into a lot of detail and without naming names I wish to know if, > at the time of connection to Postfix, there exists any feasible means of > determining the registrar used by the connecting domain? As well, I would > like to know is there any practical means of determining at the time of smtp > connection by direct enquiry of a registrar when the connecting domain was > registered and block all connections from all non-whitelisted domains > registered within the past N days?
If they also run the NS or MX services, you might be able to block them using check_sender_ns_access and/or check_sender_mx_access in Postfix. p@rick -- [*] sys4 AG https://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
