Re: [mailop] "451 Requested action aborted: local error in processing" when submitting email to ionos email services.

This seems to be an issue on your site, I checked the logs and all the times we were not able to deliver mails to you the error we had was "temporary mx resolver error". Most likely root cause: "dns.hiskp.uni-bonn.de." does not answer queries via UDP, as you also have a couple of more systems

Re: [mailop] Thoughts on envelope address local-part length limits

ind of bad behavior. / Tobias -Original Message- From: mailop On Behalf Of Slavko via mailop Sent: Monday, May 15, 2023 2:39 PM To: mailop Subject: Re: [mailop] Thoughts on envelope address local-part length limits Dňa 15. mája 2023 7:44:07 UTC používateľ Tobias Herkula via

Re: [mailop] Thoughts on envelope address local-part length limits

Be careful with references to Postels robustness principle and look into that https://datatracker.ietf.org/doc/html/draft-iab-protocol-maintenance (formally known as "postel-was-wrong") And if you reference 4.5.3.1, you should not omit "Objects larger than these sizes SHOULD be avoided when

Re: [mailop] GMX/Mail.com contact?

Feel free to reach out to mailsecur...@gmxnet.de / Tobias Herkula Senior Product Owner Mail Security Mail Application Security 1&1 Mail & Media From: mailop On Behalf Of Mike Hillyer via mailop Sent: Friday, May 12, 2023 10:29 PM To: mailop Subject: [mailop]

Re: [mailop] Receivers behavior when seeing a new header

I can not give any hints on if or how we would transport that information to the user, YET. But it would not have any negative impact on how we handle the message from a Mail Security view at our system (Web.de/GMX/Mail.com/1&1/Ionos), Bonus points if the header is signed with a 5322.From

Re: [mailop] A guy from GMX at the list?

Hi Florian, For which DKIM signing Domains you see issues? And what are your IP-Ranges? Feel free to answer off list, if you don't want to disclose this information. -Original Message- From: mailop On Behalf Of Postmaster florian-pankerl.tk via mailop Sent: Friday, April 21, 2023 2:12

Re: [mailop] Should mailing list messages be DKIM signed? (ARC / DKIM)

You don't need ARC if you are munging the 5322.From, but if you are munging the 5322.From add a strict aligned DKIM signature, this makes it easy to filter and trust your lists traffic. If you run multiple lists on the same domain, please do strict alignment between 5322.From AddrSpec and the

Re: [mailop] Idea for new internet standard: DKIM-QR

Hi Sebastian, please also be aware of the fact that the people you want to target here, will most likely not recognize such an image as QR-Code at all, as the amount of data you want to put in it is quite large and needs a lot of error correction data to counter the moiré effect, as your use

Re: [mailop] Anyone from gmx.ch here?

Answered off list / Tobias Herkula (Web.de|GMX|Mail.com) -Ursprüngliche Nachricht- Von: mailop Im Auftrag von Eliot Lear via mailop Gesendet: Donnerstag, 2. Dezember 2021 18:54 An: mailop Betreff: [mailop] Anyone from gmx.ch here? Seeing please contact offline. Thanks, Eliot

Re: [mailop] Paging GMX mail admins: issues with automatic mail forwards

Replied off list. / Tobias Herkula (Web.de|GMX|Mail.com) -Ursprüngliche Nachricht- Von: mailop Im Auftrag von Carsten Schiefner via mailop Gesendet: Montag, 29. November 2021 16:22 An: mailop@mailop.org Betreff: [mailop] Paging GMX mail admins: issues with automatic mail forwards All

Re: [mailop] Mandated emails from notifications.newbalance.com on 1st of December

Which DKIM signing Domains will be used for this send out? / Tobias Herkula (Web.de|GMX|Mail.com) Von: mailop Im Auftrag von Vytis Marciulionis via mailop Gesendet: Dienstag, 30. November 2021 16:24 An: mailop@mailop.org Betreff: [mailop] Mandated emails from notifications.newbalance.com on

Re: [mailop] Mail.ru new network range and TLSRPT support

Do you have any changes for the DKIM signing Domains? We currently have mail.ru, bk.ru, list.ru, internet.ru, inbox.ru and mail.ua on record for your system. Tobias Herkula -- Senior Product Owner Mail Security Product Mail Platform 1&1 Mail & Media GmbH | Mitte | 10115 Berlin | Deutschland

Re: [mailop] DKIM+DMARC at t-online.de (Deutsche Telekom's ISP branche)

Hi Stefano, I can not answer for Florian but can say this: We at 1&1 (Web.de/GMX/Mail.com) watched this experiment with a lot of interest and plan a very similar setting for the future under the title "NO-ALIGNMENT-SLOW-ENTRY" where we plan to start rate limiting large Bulkmail Providers if

Re: [mailop] GMAIL reject Bounces

Hello Andreas, Citing RFC 3464 Section 2 Paragraph 4: "The From field of the message header of the DSN SHOULD contain the address of a human who is responsible for maintaining the mail system at the Reporting MTA site (e.g., Postmaster), so that a reply to the DSN will reach that person.

[mailop] Vodafone Germany Mail Infrastructure Change Notification

A Friend of mine is handling SMTP Traffic for Vodafone Germany and wants to give a heads up here about a bigger change, he was not able to join Mailop so I'm citing him: > Hello everyone, > > we are in the process of moving the e-mail service of Vodafone Germany to > another platform which

[mailop] Vodafone Germany Mail Infrastructure Change Notification

A Friend of mine is handling SMTP Traffic for Vodafone Germany and wants to give a heads up here about a bigger change, he was not able to join Mailop so I'm citing him: > Hello everyone, > > we are in the process of moving the e-mail service of Vodafone Germany to > another platform which

[mailop] Vodafone Germany Mail Infrastructure Change Notification

A Friend of mine is handling SMTP Traffic for Vodafone Germany and wants to give a heads up here about a bigger change, he was not able to join Mailop so I'm citing him: > Hello everyone, > > we are in the process of moving the e-mail service of Vodafone Germany to > another platform which

[mailop] Vodafone Germany Mail Infrastructure Change Notification

A Friend of mine is handling SMTP Traffic for Vodafone Germany and wants to give a heads up here about a bigger change, he was not able to join Mailop so I'm citing him: > Hello everyone, > > we are in the process of moving the e-mail service of Vodafone Germany to > another platform

Re: [mailop] t-online.de refuses to remove an ip from their blacklist

Allow your customers to set an additional PTR. Kind regards, / Tobias Herkula Manager Detection Anti Spam Cyren (Berlin) From: mailop on behalf of Andreas Bueggeln - NOC - Profihost AG via mailop Sent: Thursday, June 18, 2020 12:57 To:

Re: [mailop] How to allow different domain in envelope and header from? (Is Gmails DMARC check broken?)

It is possible to do depending on the sacrifices you are willing to take: 5321.MailFrom Domain = imp.ch 5322.From Domain = breitband.ch 5322.Sender Domain = imp.ch If you run with that you can set DKIM Domain to imp.ch and still send with breitband.ch in your From. And alignment should be fine.