Hello
For this parameter of postscreen:
postscreen_dnsbl_allowlist_threshold
The docs says:
1. Specify a negative value to enable this feature.
2. This feature is available in Postfix 3.6 and later.
Available as postscreen_dnsbl_whitelist_threshold in Postfix 2.11 - 3.5.
So my questions
Saturday, April 29, 2023, 5:40:19 PM, Ken Peng via Postfix-users wrote:
> Hello
> When I enabled postscreen, why even gmail's sender IP was greylisted?
> 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
On 2023-04-29 at 06:43:01 UTC-0400 (Sat, 29 Apr 2023 10:43:01 +)
Ken Peng via Postfix-users
is rumored to have said:
Nope. I found that if I enabled protocol test, every provider
including gmail/orange/vodafone sending messages to me will get
response code 450. After I disabled those
On Sat, 29 Apr 2023, Ken Peng via Postfix-users wrote:
Nope. I found that if I enabled protocol test, every provider including
gmail/orange/vodafone sending messages to me will get response code 450. After
I disabled those protocol test, everything goes fine.
So what's the correct way to
The code 450 is the "deep tests" doing their stuff.
When a a remote host calls for the first time, it sees a temp-fail (code 450).
When the host calls back, *USING THE SAME IP ADDRESS*, it will be passed
through to the mail server. The host has to
call twice to get through.
With gmail
Nope. I found that if I enabled protocol test, every provider including
gmail/orange/vodafone sending messages to me will get response code 450. After
I disabled those protocol test, everything goes fine.
So what's the correct way to deal with postscreen protocol tests?
I mean the following
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
Hello
When I enabled postscreen, why even gmail's sender IP was greylisted?
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=, to=, proto=ESMTP,
helo=
And this is my configuration
The postscreen feature for RBL checks allows us to use scoring!
My configuration is based on this one here:
https://gitlab.com/noumenia/aetolos/-/blob/master/modules/el8/postfix/maincf.tpl
Take a look at lines 100 to 132.
For example:
postscreen_dnsbl_action = enforce (reject email with
Saturday, April 29, 2023, 10:15:41 AM, Ken Peng via Postfix-users wrote:
> Sorry i have a question to postscreen.
> I saw many people use postscreen for RBL checks.
> But postfix itself have the RBL checks already:
> smtpd_recipient_restrictions =
>...
>reject_rbl_client
April 28, 2023 at 1:02 AM, "Phil Stracchino via Postfix-users"
wrote:
>
> On 4/27/23 04:47, Ralph Seichter via Postfix-users wrote:
>
> >
> > * Ken Peng via Postfix-users:
> > Using rspamd instead of postscreen?
> > I'm not quite sure what you mean by that.
> > If you suggest relying on
On 4/27/23 04:47, Ralph Seichter via Postfix-users wrote:
* Ken Peng via Postfix-users:
Using rspamd instead of postscreen?
I'm not quite sure what you mean by that.
If you suggest relying on rspamd only, and forgo postscreen, I have to
disagree. In my experience, postscreen has proven
On 26.04.23 19:40, Ken Peng via Postfix-users wrote:
Using rspamd instead of postscreen?
no, using spamassassin or rspamd in addition to postscreen.
postscreen is great for eliminating bots, which is something other spam
filters only hardly detect.
It's also can machines listed in multiple
* Ken Peng via Postfix-users:
> Using rspamd instead of postscreen?
I'm not quite sure what you mean by that.
If you suggest relying on rspamd only, and forgo postscreen, I have to
disagree. In my experience, postscreen has proven highly useful in spam
prevention, in particular when DNSBL
On Wed, 26 Apr 2023 at 18:47, Wietse Venema via Postfix-users <
postfix-users@postfix.org> wrote:
> Don't do it unless you aree willing to suffer some pain. The mere
> fast that a button exists does not impy that everyone must use it.
>
>
Dear Wietse,
Could you please give me some examples where
Using rspamd instead of postscreen?
>
> Dear All,
>
> I am building a new server where I would like to build the best spam filter
> possible :)
> I am checking postscreen these days. I am planning to turn on the "deep
> tests" as well, but it seems to be really scary to me :)
>
> In the doc
On 2023-04-26 at 11:56:01 UTC-0400 (Wed, 26 Apr 2023 17:56:01 +0200)
Mihaly Zachar via Postfix-users
is rumored to have said:
Dear All,
I am building a new server where I would like to build the best spam
filter
possible :)
I am checking postscreen these days. I am planning to turn on the
Mihaly Zachar via Postfix-users:
> Dear All,
>
> I am building a new server where I would like to build the best spam filter
> possible :)
> I am checking postscreen these days. I am planning to turn on the "deep
> tests" as well, but it seems to be really scary to me :)
Don't do it unless you
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