Hello, Regarding the config option: postscreen_access_list = static:retry
And considering that: 1) "Permanent white/blacklist for remote SMTP client IP addresses. postscreen(8) searches this list immediately after a remote SMTP client connects." 2) static is a valid lookup table type 3) the similar syntax of 'transport_maps = static:retry' Shouldn't: postconf -e 'postscreen_access_list = static:retry' ; postfix reload immediately make postscreen defer all incoming email? Is there any other way to make the postscreen/postfix combination temporarily defer all incoming emails with '450 4.3.2 Service currently unavailable' (in order to give us some time to migrate the postfix server to some other IP) ? Thank you, M.