Does any one have a clue what DNSNULL means in the following context of a mail delivery error?
<....@bluewin.ch mailto:claudine.beaud@bluewin.ch> (mx-v02.bluewin.ch http://mx-v02.bluewin.ch/: 554 mxbw.lb.bluewin.ch http://mxbw.lb.bluewin.ch/ vim 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/ Arrival-Date: Thu, 11 Jul 2019 11:19:58 +0200 ...
Andreas Fink ------------------------------------------------------------------ Paradieshofstrasse 101, 4054 Basel, Switzerland andreas@fink.org mailto:andreas@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 ICQ: 8239353 Twitter: @kiwi66 PGP Key: https://www.fink.org/FILES/afink-pgp.asc ------------------------------------------------------------------
Sorry about the last mail, my spam filter declared my outgoing mail as spam as well.
This is what my mailserver detected when it analyzed your mail:
8.5 URIBL_SBL Contains an URL's NS IP listed in the Spamhaus SBL blocklist [URIs: m ail.f ink.o rg]
Maybe Swisscom/Bluewin does kind of the same, just call it differently?
Note I added some whitespaces into the domain.
As pointed out by Daniel, the original issue was caused by a listing of this IP on Spamhaus SBL and Bluewin does in fact use Spamhaus as a RBL provider and has done so for quite some time. As to the "DNSNULL" part of the error message, this was caused by an issue in the lookup of the appropriate delisting URL. The request in question has been fixed now and will provide proper answers again.
Sorry for the inconvenience.
Cheers Marcel
From: swinog-bounces@lists.swinog.ch swinog-bounces@lists.swinog.ch On Behalf Of Andreas Fink Sent: Donnerstag, 11. Juli 2019 11:33 To: swinog@swinog.ch Subject: [swinog] bluewin & DNSNULL
Does any one have a clue what DNSNULL means in the following context of a mail delivery error?
<....@bluewin.chmailto:claudine.beaud@bluewin.ch> (mx-v02.bluewin.chhttp://mx-v02.bluewin.ch: 554 mxbw.lb.bluewin.chhttp://mxbw.lb.bluewin.ch vim dzmsp-mxin12.bluewin.chhttp://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.orghttp://mail.fink.org Arrival-Date: Thu, 11 Jul 2019 11:19:58 +0200 ...
Andreas Fink ------------------------------------------------------------------ Paradieshofstrasse 101, 4054 Basel, Switzerland andreas@fink.orgmailto:andreas@fink.org https://www.fink.orghttps://www.fink.org/ Mobile: +41-78-6677333 Office: +41-61-6666330 Home: +41-61-6666345 Skype: andreasfink Jabber/XMPP: andreas@fink.orgmailto:andreas@fink.org ICQ: 8239353 Twitter: @kiwi66 PGP Key: https://www.fink.org/FILES/afink-pgp.asc ------------------------------------------------------------------
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Andreas Fink -
Claudio Kuenzler -
Marcel.Gschwandl＠swisscom.com