Hi,
anyone reading here from 1and1 / 1und1 german provider (united internet)
and can comment on why our mails getting mostly flagged as [?SPAM] when
sending to random 1and1 mailboxes?
Please find header of sample mail attached exported from receivers mail
agent. notice the missing dkim heade
Hi folks,
i know this is not postfix mailing list - but postfix list said - its not
supported yet - so hoping for a trick from postmasters ;)
I'm running a small postfix site and testing with enforce TLS for outgoing
mails. However my mails idle around in queue when remote server does not o
Wow. Awesome. Thats it. Thank you and have a nice day. I totally missed that.
Stefan
-Ursprüngliche Nachricht-
Von: Aaron Richton
Gesendet: Montag 10 September 2018 20:36
An: Stefan Bauer
CC: mailop@mailop.org
Betreff: Re: [mailop] postfix postmaster wanted - howto instantly bounce
Dear Users,
we're running a small outgoing only mailservice for our customers from two /32
ip-addresses. Hosted in different data centers in germany.
So far we have good reputation and non of our mails have been blocked.
Recently, we get in trouble with hotmail because they seem to have blocked
to their response and politely challenging them
to do what you initially asked them to do. I suggest that you do that.
You may have to do this more than once.
Best regards,
Al Iverson
On Thu, Sep 20, 2018 at 2:56 AM Stefan Bauer wrote:
>
> Dear Users,
>
> we're running a sm
Furthermore - the admin page is also broken and does infinite redirects:
https://sendersupport.olc.protection.outlook.com/snds/addnetwork.aspx
-Ursprüngliche Nachricht-
Von: Joel Golliet
Gesendet: Montag 8 Oktober 2018 17:57
An: mailop@mailop.org
Betreff: [mailop] No SNDS data f
isn’t being
collected. MS has never filled in old data. As I understand it, they don’t have
the data to be able to backfill missing days.
laura
Stefano
On Tue, 9 Oct 2018 at 09:49, Stefan Bauer mailto:s...@plzk.de> >
wrote:
Furthermore - the admin page is also broken and d
Hi,
anyone else in trouble with hotmail.com again?
We are a very low sending MX without any spam from our range. It started at
17:00 that hotmail was not offering TLS. I have no clue, why this is the case.
Is this some kind of spam defense voodoo?
Our MX tried again after an hour and got
Hi,
we just noticed that marketplace.amazon.* is not providing STARTTLS. Any amazon
employee around and can comment on this?
We are in 2018! and would like to have STARTTLS. Thanks.
Non-authoritative answer:marketplace.amazon.de
mail exchanger = 10 retail-smtp-in-eu-2.amazon.co.uk.
ma
Hi,
we just noticed that freenet.de is reject some of our mails with
451 Suspicious message, please come back later (in reply to end of DATA command)
That makes no sense to us. If mail looks fishy to freenet, they should generate
a perm. error (5xx) and not let us try over and over agai
Hi,
a lot of strato customers are using relay.rzone.de as backup-MX. Unfortunately,
this host does not offer STARTTLS.
220 relay.rzone.de ESMTP RZmta 44.9 ready (bx3)
ehlo ME
250-relay.rzone.de greets my-ip
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-DELIVERBY
250-SIZE 104857600
community :)
Stefan
-Ursprüngliche Nachricht-
Von: Ken O'Driscoll via mailop
Gesendet: Mittwoch 13 Februar 2019 10:49
An: mailop@mailop.org
Betreff: Re: [mailop] Strato Postmaster around? relay.rzone.de does not offer
STARTTLS
On Wed, 2019-02-13 at 07:31 +0000, Stefan Bauer wrot
Hi,
we're providing a small smtp sent-service for our customers (via submission
port / auth only - postfix). ~ 7.000 outgoing mails / day (via 2 hosts in
different data centers/ip networks).
As the amount of mails increase, we would like to be ready for
- stolen auth-data to our service
n Wed, 2019-05-08 at 16:45 +0000, Stefan Bauer via mailop wrote:
> we have in place:
>
> only allow pre-defined sender-addresses after auth
> monitor mail-queues for high connection count
> monitor RBLs if we're listed
> only allow single mail / 5s to be sent outgo
l via mailop
Gesendet: Mittwoch 8 Mai 2019 20:01
An: mailop@mailop.org
Betreff: Re: [mailop] Howto be a good mailop (best practice / insights wanted)
On Wed, 2019-05-08 at 16:45 +0000, Stefan Bauer via mailop wrote:
> we have in place:
>
> only allow pre-defined sender-addresses after auth
treff: Re: [mailop] Howto be a good mailop (best practice / insights wanted)
On Fri, 2019-05-31 at 11:03 +0000, Stefan Bauer via mailop wrote:
> Hi Ken,
>
> thanks again for your input. Regarding
> Add a custom header (X-abuse)
>
> is this really a thing? Could not find many mail
Please keep this on-list. This is of great help for all other mailops to
improve own setup.
Thank you.
-Ursprüngliche Nachricht-
Von: Hetzner Blacklist via mailop
Gesendet: Mittwoch 5 Juni 2019 17:43
An: mailop@mailop.org; Michael Peddemors
Betreff: Re: [mailop] Microsoft blacklistin
Hi,
can anyone confirm that I'm just blind or that this is not possible with
Microsofts Exchange Online (Office365) cloud solutions?
This works fine in all on-premise installations. I can not specify
username/password for smtp authentication nor any certs.
I just want to set outgoing mai
Hi folks,
we are still evaluating OpenXchange but having a hard time, finding an
active community around this software.
The public bugzilla tracker was shut down¹, the public forum is more or
less inactive and the official mailing lists are announce only² lists.
Are there any other places to dis
Dear Mailops,
anyone in here using OpenXchange? We are still evaluating OX but having a
hard time to get real informations or feedback at all.
a, I made some feature-recommendations ¹²³ in the forum, not a single reply
:/
Even a reply like, we do not accept requests this way would help.
b, There
Hi,
knauf.com is accepting much of our delivered mails, however afterwards
probably drop them as recipients reported via phone, that none of the mails
arrive in their mailboxes.
Mail to postmaster@ and a known contact at knauf.com did not yield any
response so far.
Apr 23 10:12:54 mx3 postfix/sm
Wow. Indeed. Thank you. The ip is 217.160.0.245 and yes, the complete ASN
is blocked.
Am Di., 30. Apr. 2024 um 13:50 Uhr schrieb Marco Moock :
>
> Am 30.04.2024 um 12:28:50 Uhr schrieb Stefan Bauer via mailop:
>
> > Sender-Domain IP is in UCEPROTECTL3, however none of his sending
&
Hi,
here is a thing, that we do not see a real solution to it and would be happy,
to get some ideas from other mailops.
We are doing MX-spamfilter service for some customers and forward "clean" mails
to customer mailservers.
We are doing recipient-checks before accepting mails.
Sometime
Hi,
we run some antispam-mailservers with ~ 10.000 mails / day for our customers.
Due to emotet and stuff, we started blocking some file extensions with great
success. Sometimes "bad" attachment slip through as they are encoded by TNEF.
Our spamfilter is not able to de-code it. Not even som
Hi,
this list is of great help for me to be a good mailop. thank you.
Now the question:
Is it bad - in terms of reputation - when domain in dkim-header (d=...) differs
from senders address?
signing is done correctly and pub-key is present at domain of corse - specified
with d=...
lik
Any ewetel postmaster around? One of our IPs (subject) get flagged as dynamic
during delivery to ewetel. However this IP is static.
No response to postmaster@ yet.
thank you.
Stefan
___
mailop mailing list
mailop@mailop.org
https://chilli.nosign
tefan
-Ursprüngliche Nachricht-
Von: Andrew C Aitchison
Gesendet: Montag 9 März 2020 10:47
An: Stefan Bauer
CC: mailop
Betreff: Re: [mailop] Ewetel postmaster wanted - your IP 116.203.31.6 seems to
be dynamic - please use the smarthost of your ISP
On Mon, 9 Mar 2020, Stefan Bauer via m
Vytis Marciulionis
Gesendet: Montag 9 März 2020 14:52
An: Stefan Bauer
CC: mailop
Betreff: Re: [mailop] Ewetel postmaster wanted - your IP 116.203.31.6 seems to
be dynamic - please use the smarthost of your ISP
Hi Stefan,
This could also happen because your PTR record of sending IP address resolves
w
Hi Jan,
i tried postmas...@ewe.net <mailto:postmas...@ewe.net> and postmas...@ewetel.de.
Will now try the third (your first suggestion) :)
thanks.
Stefan
-Ursprüngliche Nachricht-
Von: Jan-Philipp Benecke
Gesendet: Montag 9 März 2020 15:53
An: Stefan Bauer
CC:
2 | 26180 Rastede | Germany
Geschäftsführung: Jens Klibingat, Sebastian Schwarz & Sebastian Strzelecki
Aufsichtsrat: Rolf Hilchner & Heinz-Wilhelm Bogena
Stefan Bauer via mailop schrieb am 09.03.20 um 15:03:
Hi,
it's just DNS round robin for our senders. did not had a sigle is
Hi,
anyone using fbl.returnpath.net and recently received mails?
We are low-volume senders with around 5.000 mails / day and did not receive a
single mail since signup - thats 8 weeks ago.
This could be a good sign for us, or a general problem.
FBL mail address is unfiltered and monito
Hi,
one of our sending IPs (116.203.31.6) seems to got blacklisted by
hostedemail.com. However this ip adress is not blacklisted. We monitor around ~
50 public DNS-BLs.
Feedbackloops did not generate a single report yet.
Can anyone bring some light into this?
smtp May 18 16:04:19 mx3 postfix
liche Nachricht-
Von: Brian Ellwood via mailop
Gesendet: Montag 18 Mai 2020 18:00
An: Stefan Bauer
CC: mailop
Betreff: Re: [mailop] hostedemail.com contact - IP manually blacklisted -
116.203.31.6
You should find assistance via h...@opensrs.com.
___
m
Hi,
seems like the main DCC servers are down (dcc1-6.dcc-servers.net), also the
website.
Archive last mails are from end 19.
Anybody knows more? Did i miss some announcement?
Cheers
Stefan
___
mailop mailing list
mailop@mailop.org
https://ch
looks great again! Thank you folks.
If the domain rans out again, just drop me a note and i will be more than happy
to pay for domain & hosting as i really appreciate this service.
Stefan
___
mailop mailing list
mailop@mailop.org
https://chilli.nosig
Hi,
once in a while, some of our outgoing customer mails are rejected by remote
sites with a 500 code because one of our sending IPs are temporary blacklisted.
or due to other reasons we are not able to deliver the mail. I'm only talking
about cases, where the mail itself, is not the reject r
-Ursprüngliche Nachricht-
Von: Ralph Seichter via mailop
* How and when would you decide that the recipient responding with 5xx
was due to the message itself or due to a blacklisted IP address?
That's not something that can be decided based on SMTP.
You are right. I can not rely on any s
A1 is busy fixing there network¹.
https://www.zdnet.com/article/hackers-breached-a1-telekom-austrias-largest-isp/
SCNR.
Stefan
-Ursprüngliche Nachricht-
Von: Sabine Rogg via mailop
Gesendet: Dienstag 7 Juli 2020 12:25
An: mailop@mailop.org
Betreff: [mailop] A1/aon.at contact
Hel
Hi,
there is a feature in O365 that forwards mails (in/out/both..) to an
archive-mailbox for long-term archiving.
We grab this mails via pop. However our available mail-readers (Thunderbird,
Kopano) show the original mail as attachment.
This makes it very hard for handling/searching/reading
li 2020 15:55
An: Stefan Bauer ; mailop
Betreff: Re: [mailop] Post-processing Journal-Mails coming from O365,
forwardedMail
Have you tried journal rules?
https://docs.microsoft.com/en-us/exchange/security-and-compliance/journaling/configure-journaling
Best,
Faisal Misle
MCSA: Office 365
PGP Key
Von: Matthias Leisi via mailop
Gesendet: Donnerstag 9 Juli 2020 00:27
An: mailop
Betreff: Re: [mailop] Post-processing Journal-Mails coming from O365,
forwardedMail
there is a feature in O365 that forwards mails (in/out/both..) to an
archive-mailbox for long-term archiving.
We grab this mails
, at 22:36, Stefan Bauer via mailop wrote:
> there is a feature in O365 that forwards mails (in/out/both..) to an
> archive-mailbox for long-term archiving.
>
> We grab this mails via pop. However our available mail-readers
> (Thunderbird, Kopano) show the original mail as attachme
Hi,
smtp Jul 17 07:50:52 mx2 postfix/smtp[31049]: 51CBC5EBE3:
to=, relay=mx.tiscali.co.uk[62.24.139.42]:25,
delay=9509, delays=9505/3/0.35/1.2, dsn=4.1.1, status=deferred (host
mx.tiscali.co.uk[62.24.139.42] said: 453 4.1.1 wJGljsu8zj2dp Recipient Lookup
Failed (TT513) (in reply to RCPT TO c
?
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Stefan Bauer via
mailop
Sent: Friday, July 17, 2020 1:08 AM
To: mailop
Subject: [mailop] host mx.tiscali.co.uk[62.24.139.42] said: 453 4.1.1
wJGljsu8zj2dp Recipient Lookup Failed (TT513)
Hi,
smtp Jul 17 07:50:52 mx2 postfix/smtp
Hi,
my last info is, that office365 does not support authentication with external
connectors. However you can authenticate O365 with your smtp relay.
I run some mixed authentication. We check the source ip's¹ from microsofts
range, check the O365 client cert and check the mail-from address
https://postmaster.live.com/snds/
throws:
Server Error in '/SNDS' Application.
Runtime Error
Description: An exception occurred while processing your request. Additionally,
another exception occurred while executing the custom error page for the first
exc
Hi,
since days, we try to find out why one of our customer domain is blocked, when
sending mails to remote sites, where Sophos UTM-appliance (e.g. UTM-430) are in
place.
All we see is at smtp level:
: host mail3.famo24.de[80.155.146.58] said: 550
Administrative prohibition (in reply
Gesendet: Donnerstag 20 August 2020 11:13
An: Stefan Bauer
CC: mailop
Betreff: Re: [mailop] Sophos appliance reject mails from specific domains with
Administrative prohibition, confirmed spam in logs
Hello.
You need to contact Sophos support (through) their website.
They are using an internal lis
We use low priority MX records on newly deployed hosts to be able to monitor
the behaviour of these hosts without getting the full load.
If all looks sane, we bump the priority after a few hours/days.
Stefan
-Ursprüngliche Nachricht-
Von: John Levine via mailop
Gesendet: Donnerstag
Grant,
Project Tar looks like a privacy nightmare to me.
Routing my mails to a stranger in case senders just don't honor the standard
and dont talk to my primary MX.
They promise to reject, but who knows. At least in EU/Germany, that is against
the law (GDPR/DSGVO)
Stefan
Von: Grant Ta
-Ursprüngliche Nachricht-
Von: Grant Taylor via mailop
> At least in EU/Germany, that is against the law (GDPR/DSGVO)
Would you please elaborate? Either on list or direct, your choice.
If i setup for customer-domains MX records in a way, that a third-party is
handling/processing meta
Hi,
one of our pub-ip seems to be blocked by MS. Side effect is, that
olc.protection... is not offering starttls in this case.
Anyone else seen that?
# telnet eur.olc.protection.outlook.com. 25
Trying 104.47.18.161...
Connected to eur.olc.protection.outlook.com.
Escape character is '^]'.
22
Hi,
anyone aware of a bigger block at the moment?
We're having a single IP 116.203.31.6 but microsofts reject-message looks like
there is a bigger block ongoing. Network is from hetzner (DE).
737675DD1E: to=,
relay=eur.olc.protection.outlook.com[104.47.14.33]:25, delay=3.4,
delays=0.01/
Just my 5 cents:
As a small mail operator (10K mails/day) we disabled ___
mailop mailing list
mailop@mailop.org
https://list.mailop.org/listinfo/mailop
Hi,
I'm planning to operate a mailman list and want to make sure, that Reply-To is
untouched (seems to be default on MM3) and From is list-address and Sender is
list-bounce address.
However i do not see a simply way in MM3 to specify that. The settings - per
list - only offer
Anonymous
Might be related with the recent DMARC changes announced by 1&1.
-
Just a short info to whom it might interest:
Very soon, we will go live with DMARC check on incoming mails for all mailboxes
operated by WEB.DE, GMX & mail.com.
That covers several hundred of recipient domains
Hi,
we fail to deliver mail to
status=deferred (host srvmail.diversa-gmbh.com[62.91.109.87] refused to talk to
me: 550 5.5.0 550 5.7.1 IP address refused. To find the reputation of this IP
address, visit www.trustedsource.org.)
Webpage only alows to checkfor URLs. Message indicates a blo
do not only send many mails at once, they send also at very low rate
but ongoing. Rate limiting would not take care of this.
Stefan Bauer.
-Ursprüngliche Nachricht-
Von: missytake via mailop
Gesendet: Dienstag 27 April 2021 18:31
An: mailop@mailop.org
Betreff: [mailop] Best
Hi,
can anyone help to understand the error message? My sending ip is not in any
list i'm aware of, listed.
The webpage trustedsource.org does also not allow to check IP-addresses.
Anyone from McAfee or Reinmetall around?
sending ip is: 116.203.31.6 / 2a01:4f8:c0c:92be::1
Thanks.
Hi,
can anyone help to understand the error message? My sending ip is not in
any list i'm aware of, listed.
The webpage trustedsource.org does also not allow to check IP-addresses.
Anyone from McAfee or Reinmetall around?
sending ip is: 116.203.31.6 / 2a01:4f8:c0c:92be::1
Thanks.
Stefan
ould easily be the latter, I am quite unfamiliar with the
> message myself. I'm going to suggest that this is an on premises
> filtering system at the recipient's end and that the only way to resolve
> it is to have your contact inside the company reach out to their IT
> departm
Hi folks,
are 2 DKIM-signatures in a mail with different s= but for same d= a problem
in general?
According to RFC 6376 4.2 i would say no, the receiver should check both
signatures and not perm fail on the first, however we see some trouble with
some recipients:
Log from receivers:
2022-08-22T
? Or just that
> one signature is failing to verify with DKIM?
>
> laura
>
>
>
> On 26 Aug 2022, at 10:32, Stefan Bauer via mailop
> wrote:
>
> Hi folks,
>
> are 2 DKIM-signatures in a mail with different s= but for same d= a
> problem in general?
>
>
;
> laura
>
>
>
> On 26 Aug 2022, at 11:02, Stefan Bauer via mailop
> wrote:
>
> The other party is putting our mails in junk/spam folder. Mail is not
> rejected and reports, that the reason is invalid dkim signatur.
>
> Am Fr., 26. Aug. 2022 um 11:56 Uhr schrieb Laur
Dear Mailops,
I'm evaluating open-Xchange and hoping to reach some of you that also use
it and can find some answers as the public open-xchange forum is rather
dead and no mailinglist exists.
How do you maintain the OX-own user-database and keep them in sync with
other directories(LDAP,ADS) regar
tefan
Am Do., 4. Mai 2023 um 02:43 Uhr schrieb Michael Peddemors <
mich...@linuxmagic.com>:
>
> Do you have a use case you can share, eg type of customers, and number
> of accounts? Might have some recommendations.
>
>
>
> On 2023-05-03 10:24, Stefan Bauer vi
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