As Arne said "we will do that in the future", they apparently plan to reject, not just quarantine, and that would be a problem. Analyzing DMARC and tagging failing messages or putting them in Junk (with the option of overriding this for certain senders or forwarding hosts) is fine IMHO, so my recommendation would be to only quarantine, not reject, unless the recipient explicitly agrees to that. I'm not expecting them to follow my recommendations, people rarely do.
Cheers, Hans-Martin 1. April 2021 23:12, "Andrew C Aitchison via mailop" <mailop@mailop.org> schrieb: > I have lost track. > Are you saying that GMX should not use DMARC, or that they should not > treat reject as quarantine ? > > On Thu, 1 Apr 2021, Hans-Martin Mosner via mailop wrote: > >> At risk of repeating myself, you should be aware that this decision >> will not respect the will of the senders or recipients, but the >> probably well-intentioned but not necessarily well-informed will of >> the sending mail system operator. >> >> You *will* cause unintended mail rejections, and the parties >> affected (sender and recipient) are the ones who are least able to >> change anything about it (except changing their mail service >> provider, giving up on mail consolidation by forwarding, or >> migrating to a mailing list manager that does DMARC mitigations, all >> of which incur considerable effort and disruptions). >> >> One option that you should consider to mitigate the effects for >> recipients is to allow per-recipient DMARC exceptions, because the >> recipient is the one who ultimately decides whether mail is wanted >> or unwanted. If you tag messages for a transition period of a month >> or so while already providing such an exception setting, recipients >> will be able to adjust their settings before mail gets lost. >> >> Cheers, >> Hans-Martin >> >> 31. MÀrz 2021 10:00, "Arne Allisat via mailop" <mailop@mailop.org> schrieb: >> >>> Hi Renaud, >> >> Am 27.03.2021 um 14:07 schrieb Renaud Allard via mailop <mailop@mailop.org>: >> >> On 09/03/2021 18:38, Arne Allisat via mailop wrote: >> Just a short info to whom it might interest: >> Very soon, we will go live with DMARC check on incoming mails for all >> mailboxes operated by WEB.DE, >> GMX & mail.com <http://mail.com>. >> That covers several hundred of recipient domains [1] and roughly 50% of the >> German email users. >> For now we will handle reject and quarantine policies equally as quarantine. >> >> Why not respect the will of the senders and reject when they ask to do so? >>> We will do so in the future. Thats why I wrote âfor nowâ. >>> I cannot give an ETA, though. >>> >>> //Arne >>> >>> _______________________________________________ >>> mailop mailing list >>> mailop@mailop.org >>> https://list.mailop.org/listinfo/mailop >> >> _______________________________________________ >> mailop mailing list >> mailop@mailop.org >> https://list.mailop.org/listinfo/mailop > > -- > Andrew C. Aitchison Kendal, UK > and...@aitchison.me.uk > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
