Hello ! Per curiosity, do you have an idea of what the issue was ?
Thanks [image: Alexandre Schmit-Baverel] [image: Generic] <https://sign.positivegroup.com/l/Z3ptNWwzUGJRTzJMU2xyb01ydElGQT09-VzNGNG5oU1pWYjZRMTVQMUxBZ2xJZz09> [image: linkedin] <https://sign.positivegroup.com/l/Z3ptNWwzUGJRTzJMU2xyb01ydElGQT09-eFZMaExNZWZGQjMvaVVJaDArTTl6Zz09> [image: youtube] <https://sign.positivegroup.com/l/Z3ptNWwzUGJRTzJMU2xyb01ydElGQT09-VHU5ZDFDM3h6QXJ6Qm9jSUVjb2Ftdz09> *Alexandre Schmit-Baverel* Responsable Délivrabilité Groupe www.positivegroup.com <https://sign.positivegroup.com/l/Z3ptNWwzUGJRTzJMU2xyb01ydElGQT09-VzNGNG5oU1pWYjZRMTVQMUxBZ2xJZz09> [image: Sarbacane is becoming Positive User] <https://sign.positivegroup.com/l/Z3ptNWwzUGJRTzJMU2xyb01ydElGQT09-a1RCUlYzaUFUM1hkQTZoV29vMXBjUT09-czdtcUNKTFozcTJGbWpNaUZESmk4UT09> On Fri, Jun 19, 2026 at 6:48 PM 'Randolf Richardson, Postmaster via mailop' via PGF - Délivrabilité <[email protected]> wrote: > Update: GMail's staff resolved this this problem within an hour > after I posted this, and they are correctly validating DKIM/ARC > signatures again. > > > For the past three hours, GMail has been faililng to correctly > > validate DKIM/ARC signatures. Nothing changed in our configurations > > before this problem started, and remains the same now. > > > > SMTP headers added by GMail look like this: > > > > Authentication-Results: mx.google.com; > > dkim=neutral (bad version) [email protected] > > header.s=mail header.b=aPYfxSQd; > > arc=fail (dns record malformed); > > spf=pass (google.com: domain of [email protected] > > designates 65.110.3.188 as permitted sender) > > [email protected]; > > dmarc=pass (p=REJECT sp=REJECT dis=NONE) > > header.from=inter-corporate.com > > > > Our DMARC policy is also set to "p=reject" in all-lower-case > > letters, and not the way Google is recording it. As long as it > > works, I don't really care, but it's not working because it's > > accepting or quarantining instead of rejecting. > > > > Other non-GMail systems validating DKIM/ARC signatures, which > > further-confirms that our DNS records are not malformed. Updating > > the SOA serial number in the hopes that GMail will ignore any DNS > > cache corruption on their end didn't help after TTL ran out. > > > > If you get such GMail errors today, don't waste any time trying to > > troubleshoot problems on your end if other non-GMail systems are > > validating DKIM/ARC signatures correctly. > > > > Hopefully Google will get this problem sorted soon, because > > intermittently tossing messages into spam folders that they're > > failing to validate DKIM/ARC for is causing problems for end-users. > > -- > Postmaster - [email protected] > Randolf Richardson, CNA - [email protected] > Inter-Corporate Computer & Network Services, Inc. > Vancouver, Beautiful British Columbia, Canada > https://www.inter-corporate.com/ > > > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop >
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