I guess following the guidance would not hurt - contact the email mentioned. Could be something routing related?
Jakub Olexa Founder & CEO E-mail: ja...@mailkit.com <mailto:ja...@mailkit.com> Tel: +420 777 744 440 <tel:+420777744440> Mailkit - Closing the circle between Deliverability and Engagement <https://www.mailkit.com> On 9.6.2020 17:40, Jon Morby (Fido) via mailop wrote: > > The forward and reverse on our mail servers matches .... one of my > test boxes (on my home network) was new and didn’t have matching > reverse, but that the other machines I’ve tried from all have matching > forward/reverse and they’re still being rejected before EHLO / etc > > > > For example (and the actual IP that’s experiencing issues) > > > > [root@ns1 ~]# host 80.252.116.10 > > 10.116.252.80.in-addr.arpa domain name pointer mail-1-116-10.fido.net. > > [root@ns1 ~]# host mail-1-116-10.fido.net. > > mail-1-116-10.fido.net has address 80.252.116.10 > > > > Status: 5.0.0 > Remote-MTA: dns; mx01.t-online.de > Diagnostic-Code: smtp; 554 IP=80.252.116.10 - A problem occurred. (Ask your > postmaster for help or to contact t...@rx.t-online.de > <mailto:t...@rx.t-online.de> to clarify.) (BL) > > > > ☹ > > > > Jon Morby > > www.fido.net <http://www.fido.net> > > > > > > *From: *Michael Peddemors via mailop <mailto:mailop@mailop.org> > *Sent: *09 June 2020 16:10 > *To: *mailop@mailop.org <mailto:mailop@mailop.org> > *Subject: *Re: [mailop] t-online.de outage? > > > > > From a static IP with a properly aligned A <<>> PTR.. > > telnet mx01..t-online.de 25 > Trying 194.25.134.72... > Connected to mx01.t-online.de. > Escape character is '^]'. > 554 IP=104.128.144.8 - A problem occurred. (Ask your postmaster for help > or to contact t...@rx.t-online.de to clarify.) (BL) > Connection closed by foreign host. > > > On 2020-06-09 7:55 a.m., Al Iverson via mailop wrote: > > I'm getting that same error here. > > > > telnet mx01.t-online.de 25 > > Trying 194.25.134.72... > > Connected to mx01.t-online.de. > > Escape character is '^]'. > > 554 IP=206.125.175.2 - A problem occurred. (Ask your postmaster for > > help or to contact t...@rx.t-online.de to clarify.) (BL) > > Connection closed by foreign host. > > > > I'm calling it broken, not intentional. I put a notice up on my Spam > > Resource blog and Twitter. > > > > To all doing a telnet test (from a non-dynamic IP), is anyone NOT > > getting that 554 error? > > > > Cheers, > > Al Iverson > > > > On Tue, Jun 9, 2020 at 9:49 AM Michael Peddemors via mailop > > <mailop@mailop.org> wrote: > >> > >> We also had a problem with them (One of our ISP email clusters) , a > case > >> where we had two (2) PTR records, and two A Records, but either their > >> lookup, or their 3rd party tools weren't smart enough to check each > >> entry to find a A <<>> PTR match... > >> > >> When contacted, they responded by saying that 'any' flag on the > >> MULTIVALLI listing tool would prevent delisting.. > >> > >> Yeah, it looks like they went overly aggressive, not sure if they use > >> home grown tools, or a 3rd party though.. > >> > >> So you MIGHT want to check A <<>> PTR alignment, might be what they are > >> using.. > >> > >> > >> > >> On 2020-06-09 5:30 a.m., Jon Morby (Fido) via mailop wrote: > >>> Well they've responded, but weren't very helpful ... I don't think > they > >>> see a problem :( > >>> > >>> It certainly looks like a misconfiguration to me tbh > >>> > >>> Michael Rathbun via mailop wrote on 09/06/2020 03:59: > >>>> On Tue, 09 Jun 2020 04:35:40 +0200, Ralph Seichter via mailop > >>>> <mailop@mailop.org> wrote: > >>>> > >>>>>>> 554 IP=47.190.44.19 - A problem occurred. (Ask your postmaster for > >>>>>>> help or to contact t...@rx.t-online.de to clarify.) (BL) > Connection > >>>>>>> closed by foreign host. > >>>>> I remember seeing this particular error code when setting up new > mail > >>>>> servers with IPs that have not previously sent mail to T-Online > MXs. In > >>>>> these cases I e-mailed the listed address and T-Online staff > manually > >>>>> cleared the addresses. Thus, my guess is that some T-Online blocking > >>>>> mechanism is currently out of whack. > >>>> The address quoted, and the string "(BL)" does suggest that a > blocking > >>>> mechanism has wandered off into the weeds. > >>>> > >>>> mdr > >>> > >>> > >>> _______________________________________________ > >>> mailop mailing list > >>> mailop@mailop.org > >>> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > >> > >> > >> > >> -- > >> "Catch the Magic of Linux..." > >> > ------------------------------------------------------------------------ > >> Michael Peddemors, President/CEO LinuxMagic Inc. > >> Visit us at http://www.linuxmagic.com @linuxmagic > >> A Wizard IT Company - For More Info http://www.wizard.ca > >> "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd. > >> > ------------------------------------------------------------------------ > >> 604-682-0300 Beautiful British Columbia, Canada > >> > >> This email and any electronic data contained are confidential and > intended > >> solely for the use of the individual or entity to which they are > addressed. > >> Please note that any views or opinions presented in this email are > solely > >> those of the author and are not intended to represent those of the > company. > >> > >> _______________________________________________ > >> mailop mailing list > >> mailop@mailop.org > >> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > > > > > > > > > > -- > "Catch the Magic of Linux..." > ------------------------------------------------------------------------ > Michael Peddemors, President/CEO LinuxMagic Inc. > Visit us at http://www.linuxmagic.com @linuxmagic > A Wizard IT Company - For More Info http://www.wizard.ca > "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd. > ------------------------------------------------------------------------ > 604-682-0300 Beautiful British Columbia, Canada > > This email and any electronic data contained are confidential and intended > solely for the use of the individual or entity to which they are > addressed. > Please note that any views or opinions presented in this email are solely > those of the author and are not intended to represent those of the > company. > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
