On 03/08/17 11:55, Matus UHLAR - fantomas wrote: > You apparently mean something like check_sender_mx_access (reject when MX > server of sending domain points to blacklisted IP) or maybe > check_sender_a_access (similar), but with dnsbl lookups. > > Doing it on MX would require dnsbl lookups for each MX server in all > received mail. > That would massively increase amount of dnsbl lookups. > > Doing it on A would do the same, just not that much.
Do it after a white-list of senders you know Allen C
