Except that this is not applicable. In my case my mailserver is not hosted at Swisscom but on my own infrastructure, is on the same IP since years, has proper MX records and reverse DNS entries and has delivered email to the same bluewin customer yesterday successfully. Only the reply on that receiver today which I received and replied again got rejected. And the response is cryptic to me.
And if you mail to abuse@bluewin.ch mailto:abuse@bluewin.ch you get the same error...
So who is this famous DNSNULL I should contact?
On 11 Jul 2019, at 13:49, Florin sfetea f_sfetea@yahoo.com wrote:
See https://community.swisscom.ch/t5/E-Mail/Bluewin-akzeptiert-E-Mails-von-eigen... https://community.swisscom.ch/t5/E-Mail/Bluewin-akzeptiert-E-Mails-von-eigener-Domain-nicht/td-p/570002
Beste Grüsse, Regards si s-auzim de bine Florin Sfetea
From: swinog-request@lists.swinog.ch mailto:swinog-request@lists.swinog.ch Sent: Thursday, July 11, 2019 12:00 To: swinog@lists.swinog.ch mailto:swinog@lists.swinog.ch Subject: swinog Digest, Vol 174, Issue 3
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Today's Topics:
- bluewin & DNSNULL (Andreas Fink)
Message: 1 Date: Thu, 11 Jul 2019 11:32:38 +0200 From: Andreas Fink <afink@list.fink.org mailto:afink@list.fink.org> To: "swinog@swinog.ch mailto:swinog@swinog.ch" <swinog@swinog.ch mailto:swinog@swinog.ch> Subject: [swinog] bluewin & DNSNULL Message-ID: <75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org mailto:75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org> Content-Type: text/plain; charset="us-ascii"
Does any one have a clue what DNSNULL means in the following context of a mail delivery error?
<....@bluewin.ch http://bluewin.ch/ <mailto:claudine.beaud@bluewin.ch mailto:claudine.beaud@bluewin.ch>> (mx-v02.bluewin.ch http://mx-v02.bluewin.ch/ <http://mx-v02.bluewin.ch/ http://mx-v02.bluewin.ch/>: 554 mxbw.lb.bluewin.ch http://mxbw.lb.bluewin.ch/<http://mxbw.lb.bluewin.ch/ http://mxbw.lb.bluewin.ch/> vim dzmsp-mxin12.bluewin.ch http://dzmsp-mxin12.bluewin.ch/ <http://dzmsp-mxin12.bluewin.ch/ http://dzmsp-mxin12.bluewin.ch/> Swisscom AG IP: 79.134.251.203, You are not allowed to send us mail. Please see DNSNULL if you feel this is in error)Reporting-MTA: dns; mail.fink.org http://mail.fink.org/ <http://mail.fink.org/ http://mail.fink.org/> Arrival-Date: Thu, 11 Jul 2019 11:19:58 +0200 ...
Andreas Fink
Paradieshofstrasse 101, 4054 Basel, Switzerland andreas@fink.org mailto:andreas@fink.org <mailto:andreas@fink.org mailto:andreas@fink.org> https://www.fink.org https://www.fink.org/ <https://www.fink.org/ https://www.fink.org/> Mobile: +41-78-6677333 Office: +41-61-6666330 Home: +41-61-6666345 Skype: andreasfink Jabber/XMPP: andreas@fink.org mailto:andreas@fink.org <mailto:andreas@fink.org mailto:andreas@fink.org> ICQ: 8239353 Twitter: @kiwi66 PGP Key: https://www.fink.org/FILES/afink-pgp.asc https://www.fink.org/FILES/afink-pgp.asc
The pointers have been given before. This is your problem:
https://www.spamhaus.org/query/ip/79.134.251.203
Daniel
On 11.07.19 14:25, Andreas Fink wrote:
Except that this is not applicable. In my case my mailserver is not hosted at Swisscom but on my own infrastructure, is on the same IP since years, has proper MX records and reverse DNS entries and has delivered email to the same bluewin customer yesterday successfully. Only the reply on that receiver today which I received and replied again got rejected. And the response is cryptic to me.
And if you mail to abuse@bluewin.ch mailto:abuse@bluewin.ch you get the same error...
So who is this famous DNSNULL I should contact?
On 11 Jul 2019, at 13:49, Florin sfetea <f_sfetea@yahoo.com mailto:f_sfetea@yahoo.com> wrote:
See https://community.swisscom.ch/t5/E-Mail/Bluewin-akzeptiert-E-Mails-von-eigen... Beste Grüsse, Regards si s-auzim de bine Florin Sfetea *From: *swinog-request@lists.swinog.ch mailto:swinog-request@lists.swinog.ch *Sent: *Thursday, July 11, 2019 12:00 *To: *swinog@lists.swinog.ch mailto:swinog@lists.swinog.ch *Subject: *swinog Digest, Vol 174, Issue 3 Send swinog mailing list submissions to swinog@lists.swinog.ch mailto:swinog@lists.swinog.ch To subscribe or unsubscribe via the World Wide Web, visit http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog or, via email, send a message with subject or body 'help' to swinog-request@lists.swinog.ch mailto:swinog-request@lists.swinog.ch You can reach the person managing the list at swinog-owner@lists.swinog.ch mailto:swinog-owner@lists.swinog.ch When replying, please edit your Subject line so it is more specific than "Re: Contents of swinog digest..." Today's Topics: 1. bluewin & DNSNULL (Andreas Fink)
Message: 1 Date: Thu, 11 Jul 2019 11:32:38 +0200 From: Andreas Fink <afink@list.fink.org mailto:afink@list.fink.org> To: "swinog@swinog.ch mailto:swinog@swinog.ch" <swinog@swinog.ch mailto:swinog@swinog.ch> Subject: [swinog] bluewin & DNSNULL Message-ID: <75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org mailto:75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org> Content-Type: text/plain; charset="us-ascii" Does any one have a clue what DNSNULL means in the following context of a mail delivery error? <....@bluewin.ch http://bluewin.ch/ mailto:claudine.beaud@bluewin.ch> (mx-v02.bluewin.ch http://mx-v02.bluewin.ch/ http://mx-v02.bluewin.ch/: 554 mxbw.lb.bluewin.ch http://mxbw.lb.bluewin.ch/http://mxbw.lb.bluewin.ch/ vim dzmsp-mxin12.bluewin.ch http://dzmsp-mxin12.bluewin.ch/ http://dzmsp-mxin12.bluewin.ch/ Swisscom AG IP: 79.134.251.203, You are not allowed to send us mail. Please see DNSNULL if you feel this is in error)Reporting-MTA: dns; mail.fink.org http://mail.fink.org/ http://mail.fink.org/ Arrival-Date: Thu, 11 Jul 2019 11:19:58 +0200 ...
On 11 Jul 2019, at 14:55, Daniel Stirnimann daniel.stirnimann@switch.ch wrote:
The pointers have been given before. This is your problem:
https://www.spamhaus.org/query/ip/79.134.251.203
Daniel
Yes above is my problem but at the same time it can not be the reason for mail delivery to bluewin.ch http://bluewin.ch/ coming back with a cryptic DNSNULL error
Spamhaus has a issue with a customer of mine but they have not shown any proof. Above IP however is not in the disputed IP range, its my my well maintained mailserver which has never sent any spam and is not listed as sending any spam anywhere else. What Spamhaus is doing is trying to get ISPs to cancel contracts with well paying customers on first call (no judge, no proof) by putting the ISP's whole IP range into a blacklist (a /19 !) and thus punishing legitimate 3rd parties as well. This is called coercion (Nötigung) which is a criminal offense punishable by law for up to 3 years in jail. We will see if Spamhaus prefers to go to jal or change their blacklisting policy.
Never the less. Sending emailst o bluewin.ch http://bluewin.ch/ has never been affected. I sent emails successfuly yesterday to bluewin users without a problem. I don't think Spamhaus's blacklist are being used by bluewin.ch http://bluewin.ch/ as otherwise we would have had issues a lot earlier.
So this doesn't explain any DNSNULL error. And frankly, the error message is really stupid misleading...
On 11.07.19 14:25, Andreas Fink wrote:
Except that this is not applicable. In my case my mailserver is not hosted at Swisscom but on my own infrastructure, is on the same IP since years, has proper MX records and reverse DNS entries and has delivered email to the same bluewin customer yesterday successfully. Only the reply on that receiver today which I received and replied again got rejected. And the response is cryptic to me.
And if you mail to abuse@bluewin.ch mailto:abuse@bluewin.ch you get the same error...
So who is this famous DNSNULL I should contact?
On 11 Jul 2019, at 13:49, Florin sfetea <f_sfetea@yahoo.com mailto:f_sfetea@yahoo.com> wrote:
See https://community.swisscom.ch/t5/E-Mail/Bluewin-akzeptiert-E-Mails-von-eigen...
Beste Grüsse, Regards si s-auzim de bine Florin Sfetea
*From: *swinog-request@lists.swinog.ch mailto:swinog-request@lists.swinog.ch *Sent: *Thursday, July 11, 2019 12:00 *To: *swinog@lists.swinog.ch mailto:swinog@lists.swinog.ch *Subject: *swinog Digest, Vol 174, Issue 3
Send swinog mailing list submissions to swinog@lists.swinog.ch mailto:swinog@lists.swinog.ch
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You can reach the person managing the list at swinog-owner@lists.swinog.ch mailto:swinog-owner@lists.swinog.ch
When replying, please edit your Subject line so it is more specific than "Re: Contents of swinog digest..."
Today's Topics:
- bluewin & DNSNULL (Andreas Fink)
Message: 1 Date: Thu, 11 Jul 2019 11:32:38 +0200 From: Andreas Fink <afink@list.fink.org mailto:afink@list.fink.org> To: "swinog@swinog.ch mailto:swinog@swinog.ch" <swinog@swinog.ch mailto:swinog@swinog.ch> Subject: [swinog] bluewin & DNSNULL Message-ID: <75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org mailto:75DA5D85-1A68-4D10-94B8-6237FD9D54DB@list.fink.org> Content-Type: text/plain; charset="us-ascii"
Does any one have a clue what DNSNULL means in the following context of a mail delivery error?
<....@bluewin.ch http://bluewin.ch/ mailto:claudine.beaud@bluewin.ch> (mx-v02.bluewin.ch http://mx-v02.bluewin.ch/ http://mx-v02.bluewin.ch/: 554 mxbw.lb.bluewin.ch http://mxbw.lb.bluewin.ch/http://mxbw.lb.bluewin.ch/ vim dzmsp-mxin12.bluewin.ch http://dzmsp-mxin12.bluewin.ch/ http://dzmsp-mxin12.bluewin.ch/ Swisscom AG IP: 79.134.251.203, You are not allowed to send us mail. Please see DNSNULL if you feel this is in error)Reporting-MTA: dns; mail.fink.org http://mail.fink.org/ http://mail.fink.org/ Arrival-Date: Thu, 11 Jul 2019 11:19:58 +0200 ...
-
Andreas Fink -
Daniel Stirnimann