There's also nothing to prevent you from DKIM signing your bounce messages.
"bounce" messages (nothing more than coming from a null sender) are often used for spam. Gmail has always applied spam rules to them. Brandon On Mon, May 27, 2024 at 4:39 PM Kevin A. McGrail via mailop < mailop@mailop.org> wrote: > Good Question. > > The RFC purist in me says, hell no. But my calmer, gentler, experience > mail inner child would say you should work to extend your edge so you > decline the message during the SMTP conversation if at all possible. > Backscatter, joe jobs, and bounces with payloads/spam have pretty much > ruined bounce messages IMO. > > Regards, > > KAM > > On 5/27/2024 7:04 PM, Jarland Donnell via mailop wrote: > > 421-4.7.26 Your email has been rate limited because it is > > unauthenticated. Gmail requires all senders to authenticate with > > either SPF or DKIM. Authentication results: DKIM = did not pass SPF [] > > with ip: [136.175.108.34] = did not pass For instructions on setting > > up authentication, go to > > https://support.google.com/mail/answer/81126#authentication > > 5614622812f47-3d1b370fc69si2809030b6e.141 - gsmtp > > > > Bounces coming from blank envelope senders are being held to SPF/DKIM > > authentication, which of course fails. Been seeing this a lot lately. > > Should we just not send bounce emails to Google anymore? > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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