On 13.08.18 21:36, Danny Horne wrote:
I'm trying out Postscreen after having used Postgrey for some time.  The
reason for the switch is that Postgrey can cause emails from Google etc.
to take a long time to come through due to the large number of IP
addresses they use (and I don't want to whitelist the GMail addresses).

you can safely whitelist gmail addresses at postgrey level, as long as on
postscreen level.

note that both are designed to avoid spambots, which gmail servers are not.

you just must/should not white those two at other levels (postfix,
spamassassin etc).

Here's the changes I've made, they're all default from the manual, and I
include the Postscreen logs, I was expecting more, but had been
receiving emails from the same GMail address so it was possibly already
whitelisted.  Note:  These are only the changes I've made.

master.cf

smtp      inet  n       -       n       -       1       postscreen
smtpd     pass  -       -       n       -       -       smtpd
dnsblog   unix  -       -       n       -       0       dnsblog
tlsproxy  unix  -       -       n       -       0       tlsproxy

main.cf

postscreen_access_list = permit_mynetworks
postscreen_dnsbl_threshold = 2
postscreen_dnsbl_sites = zen.spamhaus.org*2 bl.spamcop.net*1
b.barracudacentral.org*1
postscreen_dnsbl_action = enforce
postscreen_greet_action = enforce

Logs

Aug 13 21:24:10 kepler postfix/postscreen[12013]: CONNECT from
[2a00:1450:4864:20::529]:38530 to [2001:41d0:2:25a6:2::1]:25
Aug 13 21:24:16 kepler postfix/postscreen[12013]: PASS NEW
[2a00:1450:4864:20::529]:38530

so, what is the problem?

Note that bost DNS blacklist/whitelists don't list ipv6 addresses.
Unhless the 2a00:1450:4864:20::529 sends pregreet text, there's no need to
block it.

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