As stated previously, enforcement of the authentication required rules has been ongoing for most of the year in limited ways (and in some respects, many years). The enforcement may apply to specific types of messages, sender reputations, specific sender/recipient pairs, or a percentage of traffic. In general, any rejection rule is the result of a number of signals, with the rejection text highlighting a specific signal.
The announcement is for a very large expansion of enforcement and fewer mitigating or contributing signals used. Brandon On Wed, Oct 11, 2023 at 7:01 AM Stuart Henderson via mailop < [email protected]> wrote: > On 2023/10/11 15:05, Giovanni Bechis via mailop wrote: > > Hi, > > starting from 02/2024 Gmail will require authenticated email for senders > who send 5,000 or more messages a day to Gmail accounts. > > However, authenticated email requirements seems to have started today, > in the past days those email messages where temporary rejected, starting > from today I have the following error message: > > 550-5.7.26 This mail has been blocked because the sender is > unauthenticated.5.7.26 Gmail requires all senders to authenticate with > either SPF or DKIM.5.7.26 5.7.26 Authentication results:5.7.26 DKIM = did > not pass5.7.26 SPF [domain.tld] with ip: [1.2.3.4] = did not pass5.7.26 > 5.7.26 To mitigate this issue, please visit Gmail's authentication > guide5.7.26 for instructions on setting up authentication:5.7.26 > https://support.google.com/mail/answer/81126#authentication > z20-20020a05600c0a1400b004068c7a951csi7296094wmp.167 - gsmtp > > I've had this start recently (a couple of weeks maybe?) to @gmail.com > addresses (though not other google-hosted domains, e.g. @googlemail.com, > yet) - sending far less than 5k/day their way. > > _______________________________________________ > mailop mailing list > [email protected] > https://list.mailop.org/listinfo/mailop >
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