On Sat, 29 Apr 2023, Ken Peng via Postfix-users wrote:
Hello When I enabled postscreen, why even gmail's sender IP was greylisted?
Did you expect or configure to deal with gmail differently?
The log says: Apr 29 15:35:35 mxin postfix/postscreen[59408]: NOQUEUE: reject: RCPT from [209.85.160.53]:50219: 450 4.3.2 Service currently unavailable; from=<x...@gmail.com>, to=<k...@posthub.me>, proto=ESMTP, helo=<mail-oa1-f53.google.com> And this is my configuration for postscreen: # postscreen postscreen_access_list = permit_mynetworks cidr:/etc/postfix/postscreen_access.cidr postscreen_blacklist_action = drop postscreen_greet_action = enforce postscreen_dnsbl_threshold = 2 postscreen_dnsbl_action = enforce postscreen_dnsbl_sites = zen.spamhaus.org*2 postscreen_dnsbl_whitelist_threshold = -2 # postscreen protocol test postscreen_pipelining_enable = yes postscreen_pipelining_action = enforce postscreen_non_smtp_command_enable = yes postscreen_non_smtp_command_action = enforce postscreen_bare_newline_enable = yes postscreen_bare_newline_action = enforce
There doesn't seem to be anything specific to gmail, so if you enable greylisting, it will apply to everyone.
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