On 27 Nov 2019, at 00:15, Wesley Peng <postmas...@wsly.de> wrote: > -exists:%{ir}.spf.rambler.ru
That expands to if the IP address (reverse check) plus /spf/rambler.ru exists… So, of you see a connection from 1.2.3.444 and 1.2.3.444.spf.rambler.ru exists, pass the spf check. -- Fairy Tales are more than true; not because they tell us that dragons exist, but because they tell us that dragons can be beaten.