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: 5.0.0Remote-MTA: dns; mx01.t-online.deDiagnostic-Code: smtp; 554 IP=80.252.116.10 - A problem occurred. (Ask your postmaster for help or to contact t...@rx.t-online.de to clarify.) (BL) ☹ Jon Morby www.fido.net From: Michael Peddemors via mailop Sent: 09 June 2020 16:10 To: 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
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