Am 13.09.2023 um 02:54 schrieb DL Neil via Postfix-users:
Have been updating the .cf files (mostly ciphers, but also...)
Our old friend "UGFzc3dvcmQ6" is back.
(previously bounced-off without appearing in daily pflogsumm)
Grrr!
...
unknown[146.247.146.134]: SASL LOGIN authentication failed:
Am 22.06.23 um 19:18 schrieb Steffen Nurpmeso:
Robert Schetterer wrote in
:
|Am 22.06.2023 um 13:58 schrieb André Rodier via Postfix-users:
...
|> Shortly after it has been setup, I see brute force attacks (not
|> surprising) from a whole /24 network (more surp
Am 22.06.2023 um 13:58 schrieb André Rodier via Postfix-users:
Hello, all.
I just set-up a new server, running postfix, with submission(s)
activated on standard ports (587, 465)
Shortly after it has been setup, I see brute force attacks (not
surprising) from a whole /24 network (more
Am 07.03.23 um 20:32 schrieb Charles Sprickman:
On Mar 7, 2023, at 1:14 PM, Robert Schetterer via Postfix-users
wrote:
Am 07.03.23 um 18:57 schrieb Patrick Ben Koetter via Postfix-users:
* toganm--- via Postfix-users :
Maybe it would have been a better idea to check if the mail server
Am 07.03.23 um 18:57 schrieb Patrick Ben Koetter via Postfix-users:
* toganm--- via Postfix-users :
Maybe it would have been a better idea to check if the mail server is listed
in any rbl sites. For one it is listed in Abusix and my server is rejected it
as a result
What makes you believe
Am 24.05.22 um 16:14 schrieb Dan Mahoney:
Hey all,
Is there a milter of some sort that I can configure to reject (for some to:
addresses) at the end of DATA, but still forward the mail on? Im dealing with
some deleted users who both got a lot of spam, but also were in the critical
path for
Am 06.05.22 um 11:04 schrieb Víctor Rubiella Monfort:
Thanks for the proposals, the main problem is accounts names and domains
could be totally different. I'm reconsidering this approach to add only
selected accounts to able to cross domains, simplifing automation and
increasing security.
Am 24.02.21 um 23:29 schrieb Wietse Venema:
j...@nunyuh.net:
I've purposefully held off on responding to any of this but if the
devs\list-owners are fine with the community converting this into a
forum about race + software & computer terms, albeit temporarily, then
fine - let's "damn the
Am 21.03.20 um 10:25 schrieb Wesley Peng:
Hello
On desktop I always use Thunderbird for MUA.
Thunderbird is clean and lite, handling protocol well.
But for mobile (I primarily use iOS), I couldn't find a good MUA to use.
I tried almost every release on appStore (outlook, edison, bluemail,
Am 21.11.2019 um 09:01 schrieb Wesley Peng:
Hello
I saw a trend that, every ESP has taken hard work on antispam policy.
For example, from my test cases:
1. gmail totally can't be registered from PC, only mobile client (gmail,
outlook etc) can sign up a new username. they require mobile
Am 07.10.19 um 07:11 schrieb martin f krafft:
Quoting "Wietse Venema", who wrote on 2019-10-06 at 19:13 Uhr -0400:
Perhaps the SMTP client IP address 2001:db8:bad::cafe:: has no PTR
record (or the name does not resolve to 2001:db8:bad::cafe::).
Good point, but the address has a PTR record to
Am 27.08.19 um 18:45 schrieb Linda Pagillo:
Good day everyone. Quick question and please forgive me if this is
redundant. I have a Postfix server running on CentOS7 and I use Webmin
to manage it. Is there a way for me to set up and configure DKIM using
Webmin? I have been searching Google and
Am 17.03.19 um 20:59 schrieb Erwan David:
Le 17/03/2019 à 13:44, Czarek a écrit :
Check if you are not an open relay. Configure SPF, DKIM, DMARC
and Reverse DNS.
Than contact to the spam lists.
Here you can check where your IP is listed.
Rgds
Wesley.
In my case thaere is no spam list, I am
Am 17.03.19 um 08:44 schrieb Matthew McGehrin:
Hi Johannes,
Gone are the days of being able to send normal emails to these
providers. They use automated algorithms that block your email
automatically. Your IP reputation has a lot to do with it as well, along
with the IPs in your /24. For
Am 21.02.19 um 17:03 schrieb Matus UHLAR - fantomas:
On 21.02.19 10:36, Edouard Guigné wrote:
My mail server is intalled in a old deprecated linux version (debian
5.0) with postfix 2.5.5
oh... debian 7.0 is not supported for (nearly) a year, 6.0 for three
years,
5.0 for seven years (debian
Am 22.12.18 um 07:55 schrieb Stefan Bauer:
nights later, a better approach seems to have a policy service that does
the tls pre-checking.
long time ago i wrote this
https://blog.sys4.de/recipient-verification-tls-mandatory-modus-en.html
perhaps it helps
Something like this already
Am 11.10.2018 um 17:47 schrieb pg...@dev-mail.net:
> On Thu, Oct 11, 2018, at 2:37 AM, Robert Schetterer wrote:
>> http://dkimproxy.sourceforge.net/ "may"
>> help for this case
>
> In principle. Tho, not clear yet on whether I want/prefer a milter
Am 11.10.2018 um 10:51 schrieb Matus UHLAR - fantomas:
On 11.10.18 13:35, Илья Шипицин wrote:
we use opendkim (somehow it does not crash for us, yes, I seen many
unresolved issues).
however, I'd like to raise another question :)
opendkim is attached to postfix via milter. it is pain.
under
y of
>>> message
>>> > id ..."
>>> >
>>> > any suggestion ?
>
>> сб, 29 сент. 2018 г. в 16:21, Wietse Venema :
>>> Open a web search engine, ask for for 'logfile analysis tools'.
>
http://sareport.darold.net/
https://ww
ls_cert_file = /etc/postfix/ssl/triata.pem
> smtpd_tls_key_file = /etc/postfix/ssl/triata.key
> smtpd_tls_received_header = no
> smtpd_tls_security_level = may
> smtpd_tls_session_cache_database =
> btree:/var/spool/postfix/smtpd_tls_session_cache
> transport_maps = mysql:/etc/
ents. Is there any
> other way to do than using a milter?
>
> Thanks for your advices.
>
> André
>
Best Regards
MfG Robert Schetterer
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e to write as another user, so simple
> variable comparison like '$sasl_user == $mail_from' would be a prefect
> match.
>
>
> Thanks in advance.
>
> --
>
> Best regards,
> Mate200
>
>
do want something like this ?
https://github.com/croessner/vrfydmn
Best
box quota, also the blog is
old ,things may have changed , you may should cover the used port by vpn
, ssltunnel etc
more
https://www.dovecot.org/list/dovecot/2016-July/104830.html
https://wiki2.dovecot.org/Quota
Best Regards
MfG Robert Schetterer
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é um dos destinatários aos quais
> ela foi endereçada, por favor destrua-a e a todos os seus eventuais
> anexos ou copias realizadas, imediatamente.
> É proibida a retenção, distribuição, divulgação ou utilização de
> quaisquer informações aqui contidas.
> Por favor, informenos sobre
te.com/>
> Architecture for Real Enterprises
> <https://www.infoworld.com/blog/architecture-for-real-enterprises/> at
> InfoWorld
> On Slippery Ice <https://eapj.org/on-slippery-ice/> at EAPJ
>
are you informed about dkim,spf,dmarc ?
Do you relay for third party
.,rethink of your
whole mail design , look at your logs then choose the tool or tec which
design fits best for desired task
Best Regards
MfG Robert Schetterer
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tils
some blog
https://sys4.de/de/blog/2014/01/12/imap-weiterleitungen-mit-pop3toimap-als-ersatz-fur-smtp-weiterleitungen/
Best Regards
MfG Robert Schetterer
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tware/getmail/documentation.html#features
perhaps then no need for maildrop/procmail anymore, depends what you
goal add dovecot / sieve
Best Regards
MfG Robert Schetterer
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-smtp-auth-brute-force-attacks/
https://sys4.de/de/blog/2012/12/28/botnets-mit-rsyslog-und-iptables-recent-modul-abwehren/
Best Regards
MfG Robert Schetterer
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21 and 821).
>
I think the question might be : is
reject_unknown_helo_hostname rfc alike today, it wasnt in the past
postfix faqs are only pointing
on
reject_non_fqdn_helo_hostname for rfc
additional
reject_invalid_helo_hostname is acceptable in real world setups
Best Regards
MfG Robert Schett
curity signatures, rspamd
Best Regards
MfG Robert Schetterer
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Best Regards
MfG Robert Schetterer
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Am 05.03.2017 um 17:16 schrieb Maurizio Caloro:
> But you here in this Thread have you all three possiblities installed?
> - SPF, DMARC, and DKIM ?
yeah all full implemented
Best Regards
MfG Robert Schetterer
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Am 05.03.2017 um 16:27 schrieb Michael Neurohr:
> On 2017-03-05 10:01, Robert Schetterer wrote:
>> Am 05.03.2017 um 09:11 schrieb Robert Schetterer:
>>>
>>> Hi Viktor, seems that hotmail etc has included some new antispam
>>> procedures and now blocks big ip ra
Am 05.03.2017 um 09:11 schrieb Robert Schetterer:
> Am 04.03.2017 um 23:18 schrieb Viktor Dukhovni:
>>
>>> On Mar 4, 2017, at 4:50 PM, Maurizio Caloro <mauri...@caloro.ch> wrote:
>>>
>>> If i send any mail go @hotmail this will never arrive, bu
pf, dkim etc
does not help
i filled out a form to get my servers ip open again , however their
whole new antispam seems somekind broken
Best Regards
MfG Robert Schetterer
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to communicate with it?
>
> Thanks for any feedback
>
> Mauri
>
>
as long you have a mail app that does smtp , imap, pop3
this should work
found by google
http://support.blackberry.com/kb/articleDetail?ArticleNumber=000010154
Best Regards
MfG Robert Schetterer
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htt
isp-b
hm perhaps try with header checks on reply-to headers action transport
but i think that can result in unwanted routings cause in standard every
mail will pass header checks...wait for list better ideas
Best Regards
MfG Robert Schetterer
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Schle
t visible as new features (thought there
> still are enough to make an upgrade worthwhile), but happens behind
> the scenes as improvements to internal code, and updated tests to
> ensure that future changes won't inadvertantly break something.
>
> Wietse
>
Happy Birthda
y, but maybe I don't understand the risks well enough.
some freemailers have a limit of 10 MB, so its perhaps a good choice to
set it for outgoing external mail, for inside a higher amount up to 50
sometimes makes sense
Best Regards
MfG Robert Schetterer
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Am 21.08.2016 um 19:01 schrieb Benny Pedersen:
> On 2016-08-21 18:48, Robert Schetterer wrote:
>
>>> does dns servers support it aswell as idn ?
>> sombody checked modoboa ?
>
> somebody created a ebuild for it ?
>
> i still miss your gentoo-overlay nam
make smtputf8 work imho
>
> and yes it being a problem for so long, that i just hack it to
> postfixadmin adding the idn dns name to mysql, and it works, personly i
> dont need smtputf8 here
>
> does dns servers support it aswell as idn ?
>
>
>
sombody checked modoboa ?
Am 21.08.2016 um 14:13 schrieb Wietse Venema:
> Robert Schetterer:
>> Am 21.08.2016 um 05:10 schrieb Steve Atkins:
>>> I find I need to extract a list of deliveries, and delivery attempts, from
>>> postfix logs. Ideally I'd like to feed /var/log/mail.log into s
; message-id} for every email.
>
> Does anyone know of a log analyzer or some other script that'll do that?
>
> Cheers,
> Steve
>
http://linux.die.net/man/1/pflogsumm
https://github.com/benningm/saftpresse
https://sourceforge.net/projects/logwatch/
Best Regards
MfG Robert Sch
if a DMARC policy query for "blue.example.com" contained
"rua=mailto:repo...@red.example.net;, the host extracted from the
latter ("red.example.net") does not match "blue.example.com", so this
procedure is enacted. A TXT query for
"blue.example.com._report
orried about doing.
>
> Thanks,
>
> Ben
>
Best Regards
MfG Robert Schetterer
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mples may not fit your problem
exactly
Best Regards
MfG Robert Schetterer
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found, try again.
>
> $ host 2.0.0.127.bl.mailspike.net
> 2.0.0.127.bl.mailspike.net has address 127.0.0.2
> 2.0.0.127.bl.mailspike.net has address 127.0.0.10
>
>> On 21/07/16 20:54, Dominik Chilla wrote:
>
> Aloha mai Nai`a.
>
same here, i disabled bl.mailspike.n
Am 20.07.2016 um 19:20 schrieb Christian Rößner:
>
>> Am 20.07.2016 um 17:59 schrieb Robert Schetterer <r...@sys4.de>:
>>
>> Am 20.07.2016 um 09:17 schrieb Christian Rößner:
>>> Hi,
>>>
>>> I was interested which spamassassin (including d
ure
spamass-milter but however very good idea
Best Regards
MfG Robert Schetterer
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try:
>
> https://signing-milter.org (Thanks to Andreas Schulze for the home)
>
> Code: https://github.com/croessner/sigh
>
> Feedback very welcome
>
> Christian
>
Hi Christian, do you plan SMIMEA Support on the long run ?
https://tools.ietf.org/html/draft-ietf-dane-smim
Am 09.07.2016 um 19:40 schrieb Lefteris Tsintjelis:
> On 09 Jul 2016, at 19:34, Robert Schetterer <r...@sys4.de> wrote:
>
> Am 09.07.2016 um 17:07 schrieb Lefteris Tsintjelis:
>> Is this a good postfix way to stall attackers (besides log parsing and
>> fire wa
abwehr-des-botnets-pushdo-cutwail-ehlo-ylmf-pc-mit-iptables-string-recent-smtp/
additional fail2ban, but log parse was to slow at my side
and for sure use postscreen
if they love you , dont expect any better time with whatever solution
you use, but if youre in luck its only a wave
Best Regards
MfG
Am 22.05.2016 um 19:00 schrieb Phil Stracchino:
> On 05/22/16 12:30, Robert Schetterer wrote:
>> loose mail means silent discard, this should never happen
>> you might not get the mail or some bounce ,but there is less you can do
>> with "broken" forwarders in any
this should never happen
you might not get the mail or some bounce ,but there is less you can do
with "broken" forwarders in any case.
If someone decides to act as forwarder he has to honor existing
dkim/dmarc/spf cases
Best Regards
MfG Robert Schetterer
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etection of these identification methods more automatic.
>
> Hats off to programmers for providing/maintaining tools that the masses don't
> appreciate.
>
Best Regards
MfG Robert Schetterer
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Sit
i used it on relays , and limited the funkcions of the module
to do very small changes on a few tables for total postfix ignorant
users, you shouldnt use it as a general config tool
>
> -Tom
Best Regards
MfG Robert Schetterer
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Franziska
pilation options in the spec
> file to fit our build needs. (Yet, I cannot pretend I am the best of
> builders around. If I continue with these sRPMs, I might have to contact
> the author for some assistance.)
>
> So, the issue still remains open to me.
>
> All the best,
&
his subject, I would appreciate any and all
> feedback.
>
> Thanks in advance.
>
> All the best,
> Nick
http://repo.mailserver.guru/7/os/x86_64/repoview/postfix.html
http://repo.mailserver.guru/7/os/x86_64/Packages/postfix-2.11.6-1.el7.centos.x86_64.rpm
not total up2date but s
ork at migrate
>
>>> The problem is already solved by Allen Coates. :-)
>>
>> what problem ?
>
> "how to configure smtpd to close connection after 3 authentication error"?
> http://article.gmane.org/gmane.mail.postfix.user/254364
>
> Gabor
>
drop the connection until at least 3 attempts to
>>authenticate have failed.
>>
>> The affected Postfix version is 2.11.3, our old MTA.
>> The new one is not found yet by the bad guys.
>>
>> Regards
>>
>> Gabor
>
>
Best Regards
MfG R
hem or simply reject at the start
when you recieve it, and only if your customer ordered you to do so
but in general you are not allowed to burn otherones letters
Best Regards
MfG Robert Schetterer
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Am 31.01.2016 um 18:04 schrieb Ron Garret:
>
> On Jan 31, 2016, at 1:28 AM, Robert Schetterer <r...@sys4.de> wrote:
>
>> Am 31.01.2016 um 09:56 schrieb Ron Garret:
>>> Hello,
>>>
>>> What is the usual way to start a milter process? Can post
nks,
> rg
>
milters are usually seperate services
Best Regards
MfG Robert Schetterer
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Aufsich
mailbox saving the mails at the wrong time.
> Please can someone help me if something have to be done regarding this
> issue?
> Thanks
>
do you mean issue to fix with this plugin ?
https://addons.mozilla.org/de/thunderbird/addon/imap-received-date/?src=search
Best Regards
MfG Robert Schett
ailbox_base = /usr/local/virtual
virtual_minimum_uid = 1001
virtual_uid_maps = static:1001
virtual_gid_maps = static:1001
both postfix an dovecot have more data in sql
so its a question of "design" what you want
Best Regards
MfG Robert Schetterer
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http://s
try google
dovecot postfix ubuntu
to find masses of step by step instructions
also
http://wiki2.dovecot.org/HowTo
should help and for sure the well done postfix doku
>
>
> Am 30.12.2015 um 23:02 schrieb Robert Schetterer:
>> Am 30.12.2015 um 21:47 schrieb Dennis Steinkamp:
&
dont know if it covers your needs
>
> Thank you for answering.
>
> Dennis
Printed books in general can t be up2date these days
as both projects postfix and dovecot are very active
but they can teach basics
Best Regards
MfG Robert Schetterer
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ern/
sorry german only
Best Regards
MfG Robert Schetterer
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'm not very good with regular expressions. Could that be the problem here?
>>
>> Please let me know if there's other information I can provide to help.
>>
>> Thanks,
>> Alex
perhaps more what you want
https://www.void.gr/kargig/blog/2013/11/24/anonymize-headers-in-postfix/
Best Regards
MfG Robert Schetterer
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gt; I'm not very good with regular expressions. Could that be the problem here?
>>
>> Please let me know if there's other information I can provide to help.
>>
>> Thanks,
>> Alex
perhaps this helps
https://posluns.com/guides/header-removal/
https://falkhusemann.de/blog/2012/08/postfix-header-anonymisieren/
Best Regards
MfG Robert Schetterer
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blog/2014/03/27/fighting-smtp-auth-brute-force-attacks/
https://sys4.de/de/blog/2012/12/28/botnets-mit-rsyslog-und-iptables-recent-modul-abwehren/
http://blog.schaal-24.de/firewall/postfix-postscreen-ip-in-die-firewall-eintragen/
Best Regards
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Am 10.09.2015 um 10:47 schrieb Peter:
> What you don't want to do is run postscreen and postgrey on the same
> system.
you can do it if you use i.e postgrey very selective
but for sure portscreen leaves not very much for postgrey
Best Regards
MfG Robert Schetterer
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Am 10.09.2015 um 08:37 schrieb Robert Chalmers:
> I’m currently running postscreen, and am wondering how I would add
> spamassassin to the main.cf configuration, or are they mutually exclusive?
>
>
no problem works nice , perhaps use it as milter
Best Regards
MfG Rober
ackage it may be possible futher
> improve the updated package and do an non-maintainer upload.
Yes, yes, yes Debian/Ubuntu should go Postfix 3.x soon
Best Regards
MfG Robert Schetterer
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dex.html
Best Regards
MfG Robert Schetterer
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Am 28.08.2015 um 19:56 schrieb Per olof Ljungmark:
On 2015-08-28 19:55, Robert Schetterer wrote:
Am 28.08.2015 um 19:46 schrieb Per olof Ljungmark:
On 2015-08-28 18:07, Viktor Dukhovni wrote:
On Fri, Aug 28, 2015 at 05:59:08PM +0200, Per olof Ljungmark wrote:
Yes, that helped
wonder how others are mitigating this activity. Pointers, advice
welcomed (and thanks in advance).
_F
if youre the only user, postscreen and fail2ban should be fine
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MfG Robert Schetterer
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Am 28.08.2015 um 20:28 schrieb Forrest:
On 8/28/15 2:09 PM, Robert Schetterer wrote:
Am 28.08.2015 um 20:03 schrieb Forrest:
I've become used to the script kiddies sending out large connection
requests (I do have a threshold set). They are able to get around it by
other connections
: 8bit
As my knowledge sort of ends here I will ask our sysadmin Monday to look
over what is coming out of IMP, but I seriously doubt that it is
anything wrong with it.
Thanks!
old imp version ?
https://bugs.horde.org/ticket/13851
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MfG Robert Schetterer
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http
as before
, another option use smtp verify, or create
static tables at/from sql change time with secure copy etc
Best Regards
MfG Robert Schetterer
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perhaps with fedora read
https://www.mind-it.info/forward-postfix-spf-srs/
https://github.com/roehling/postsrsd
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MfG Robert Schetterer
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advice is welcomed. Thank you all in advance.
Best Regards
MfG Robert Schetterer
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to some Junk folder etc
Best Regards
MfG Robert Schetterer
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(also inside spam/junk).
thanks
Pol
http://mail.live.com/mail/policies.aspx
Best Regards
MfG Robert Schetterer
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, but does not exact match
what you want , but it should help with mail routing basics
https://sys4.de/de/blog/2015/05/04/postfix-gateway-virtual-bcc-multiplicator/
additional read docs from victors advice !!!
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MfG Robert Schetterer
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/ADDRESS_REWRITING_README.html#auto_bcc
http://www.postfix.org/postconf.5.html#recipient_bcc_maps
Best Regards
MfG Robert Schetterer
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to that host, show the whole main.cf
Best Regards
MfG Robert Schetterer
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there's no reason to have a memorable
one. This also avoids passwords that are used at multiple sites
and get compromised when those sites get breached.
have a look at
https://github.com/croessner/vrfydmn/
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MfG Robert Schetterer
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-ausgehend-unterordnern/
sorry german only , but tec side should be understandable anyway
Best Regards
MfG Robert Schetterer
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and DEB file).
Just out of curiosity, what happened to *original* download link
http://postfix.state-of-mind.de/patrick.koetter/saslfinger/ ?
I think it moved or is in migration, stay tuned for more info
Best Regards
MfG Robert Schetterer
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Best Regards
MfG Robert Schetterer
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/de/blog/2014/11/17/sicheres-lmtp-mit-starttls-in-dovecot/
but you should not do it via internet link ( however ssl is now possible
), setup additional private network interfaces, tunnel , vlans etc
Best Regards
MfG Robert Schetterer
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and won't get
black listed.
Please help.
Regards.
Tuhin.
Dhaka. BD.
do strong outgoing spam filtering, i.e with clamav-milter, spamassassin
, or as framework amavis
Best Regards
MfG Robert Schetterer
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://de.postfix.org/httpmirror/postconf.5.html#smtpd_reject_unlisted_recipient
as well as other setup examples and conf stuff
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MfG Robert Schetterer
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or yahoo. Only the
receiving system can answer why some specific mail was marked as
spam, all we can do is guess.
-- Noel Jones
just one more idea add a dmarc policy, i think there is a whitelist
feature at yahoo
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MfG Robert Schetterer
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stuff in ubuntu
Best Regards
MfG Robert Schetterer
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Robert Schetterer
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actions, or any other idea how get notice about holded
mails without third party scripting or however how would you goal the
problem meanwhilesetting up a cron watch hold queue shell script etc ?
Best Regards
MfG Robert Schetterer
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that would be a good solution, too.
But this specific developer is _very_ busy.
Andreas
Best Regards
MfG Robert Schetterer
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