When reject_unknown_client_hostname triggers on an NXDOMAIN it returns a 550
error, which is great. When it triggers because there is no PTR record, it
returns a 450 error, which is also great… except.
What I see is servers that connect hundreds of times, getting 450 errors and
ignoring them
On 2013-06-30 LuKreme wrote:
When reject_unknown_client_hostname triggers on an NXDOMAIN it returns
a 550 error, which is great. When it triggers because there is no PTR
record, it returns a 450 error, which is also great… except.
What I see is servers that connect hundreds of times, getting
I am in the process of setting up a second domain for mail, but am at a
bit of a roadblock. When I check things with mxtoolbox smtp test,
everything is correct on my primary domain, but on the second one I get
a message Warning - Reverse DNS does not match SMTP Banner. Reverse
DNS is correct
LuKreme:
When reject_unknown_client_hostname triggers on an NXDOMAIN it
returns a 550 error, which is great. When it triggers because there
is no PTR record, it returns a 450 error, which is also great?
except.
That is incorrect. The 450 code is for errors where lookup
failed (no result
Cliff Dunn:
I am in the process of setting up a second domain for mail, but am at a
bit of a roadblock. When I check things with mxtoolbox smtp test,
everything is correct on my primary domain, but on the second one I get
a message Warning - Reverse DNS does not match SMTP Banner. Reverse
From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org]
On Behalf Of Jeroen Geilman
Sent: 29 June 2013 22:42
To: postfix-users@postfix.org
Subject: Re: cert error on outlook when send email using ssl
On 06/29/2013 08:25 PM, kazabe wrote:
Hi.
Im trying to use postfix
On 6/30/2013 3:12 AM, LuKreme wrote:
When reject_unknown_client_hostname triggers on an NXDOMAIN it returns a 550
error, which is great. When it triggers because there is no PTR record, it
returns a 450 error, which is also great… except.
What you're seeing is the PTR lookup fails with a
On Sun, Jun 30, 2013 at 5:33 AM, Bart J. Smit b...@smits.co.uk wrote:
---
StartSSL will do you a free certificate. https://www.startssl.com/
+1 to Bart's comment. Just get a free cert from StartCom. I have no
affiliation, and YMMV, but back in 2011 I
Jerry schreef op 2013-06-29 22:05:
On Sat, 29 Jun 2013 13:25:50 -0500
kazabe articulated:
Hi.
Im trying to use postfix with ssl. Now is working, but i have a
little situation with the outloook clients.
always to send a email, see a message
The name of the security certificate is invalid or
On 6/30/2013 3:12 AM, LuKreme wrote:
When reject_unknown_client_hostname triggers on an NXDOMAIN it returns a 550
error, which is great. When it triggers because there is no PTR record, it
returns a 450 error, which is also great… except.
What I see is servers that connect hundreds of
On 28/06/13 22:30, Wietse Venema wrote:
Wietse Venema:
John Fawcett:
I use fail2ban in order to block some types of apparently malicious
connections to postfix when the clients keep retrying. For example the
As you agree logging every failed command would not be safe by
default.
On the
John Fawcett:
I would like to propose the following addition. As well as logging
error_count as per the original patch, it also logs the number of
messages accepted during the smtp session. The aim of that would be to
identify clients that repeatedly connect and never attempt delivery.
Why do
Wietse Venema:
John Fawcett:
I would like to propose the following addition. As well as logging
error_count as per the original patch, it also logs the number of
messages accepted during the smtp session. The aim of that would be to
identify clients that repeatedly connect and never
On 01/07/13 02:18, Wietse Venema wrote:
John Fawcett:
I would like to propose the following addition. As well as logging
error_count as per the original patch, it also logs the number of
messages accepted during the smtp session. The aim of that would be to
identify clients that repeatedly
On 01/07/13 02:59, Wietse Venema wrote:
Wietse Venema:
John Fawcett:
I would like to propose the following addition. As well as logging
error_count as per the original patch, it also logs the number of
messages accepted during the smtp session. The aim of that would be to
identify clients
On 6/28/2013 12:31 PM, John Fawcett wrote:
One type of connection which I cannot block in fail2ban are clients that
try the AUTH command on port 25, where I have disabled it. I got 245
connections this morning in the space of 5 minutes and those are the
ones that got through despite the
On 01/07/13 04:30, Stan Hoeppner wrote:
On 6/28/2013 12:31 PM, John Fawcett wrote:
One type of connection which I cannot block in fail2ban are clients that
try the AUTH command on port 25, where I have disabled it. I got 245
connections this morning in the space of 5 minutes and those are the
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