Hi Gang My personal mailserver is not able to send any emails to gmail accounts since several months. I was hoping this would solve itself eventually. It did not.
There are no breaches or spam or anything sent from that server. I would know as I am part of the AS6772 Abuse Desk. :-) Just the dozed or so emails per day sent by my family members and myself. Even emails to my own Gmail Account where my sending email address for sure is a know past sender, are being blocked. The Error: ----- Transcript of session follows ----- ... while talking to gmail-smtp-in.l.google.com.: >>> DATA <<< 550-5.7.1 [2001:4060:dead:beef::1 19] Our system has detected that this <<< 550-5.7.1 message is likely suspicious due to the very low reputation of the <<< 550-5.7.1 sending domain. To best protect our users from spam, the message has <<< 550-5.7.1 been blocked. Please visit <<< 550 5.7.1 https://support.google.com/mail/answer/188131 for more information. ds3si1043668ejc.545 - gsmtp 554 5.0.0 Service unavailable 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.f.e.e.b.d.a.e.d.0.6.0.4.1.0.0.2.ip6.arpa domain name pointer magma.woody.ch. magma.woody.ch has address 157.161.57.1 magma.woody.ch has IPv6 address 2001:4060:dead:beef::1 No DNS PTR issue I guess :-) I have registered woody.ch and magma.woody.ch with Gmail Postmaster Tools about one month ago, in the hope that eventually I would get some hint to the cause. Still 'Spamrate' and 'IP Reputation' and 'Domain Reputation' (all other items too) still show 'there is no data available yet'. Not listed in any blacklists @ MXToolbox. An SPF record exists since several years. woody.ch descriptive text "v=spf1 ip4:157.161.57.0/27 ip6:2001:4060:dead::/48 -all" Yesterday, after re-reading google email recommendations, I also added a DMARC entry: _dmarc.woody.ch descriptive text "v=DMARC1; p=reject; rua=mailto:paniz...@woody.ch; ruf=mailto:paniz...@woody.ch; aspf=s" Still the problem persists as of a couple minutes ago. DKIM is not a solution. I faced too many problems with mailinglists and similar which did alter the header and broke DKIM signatures. Has anyone a hint what could be the cause for this problem? And yes, disabling IPv6 seems to solve the issue, but that is the wrong way dealing with it :-) Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
