Hi, Google did similar to me last year from December 2024 to around May this year. *Eventually* their 'postmaster tools' software revealed an extra column which showed that they were taking in to account the uk.net part of my email domain; something over which I have no control.
I had a word with Exim and together we managed to route mail for *@gmail.com addresses through a trusted third party. Pretty frustrating and embarrassing for me at the time but perhaps you could see what Postmaster Tools says about your domain? https://postmaster.google.com/managedomains?pli=1 Pete. > On 5 Jun 2025, at 17:53, Daniel R. Nash via mailop <mailop@mailop.org> wrote: > > Has anyone been able to resolve this gmail block? Our messages have been > getting blocked progressively worse since Feb 2025 until now where we are at > ~80% of messages being rejected and Google will not respond to requests. We > aren’t a bulk sender and all usual best practices are followed > SPF,DKIM,DMARC. Anyone else experience this? > 142.250.105.27 failed after I sent the message. > Remote host said: 550-5.7.1 [x.x.x.x 12] Gmail has detected that this > message is likely > 550-5.7.1 unsolicited mail. To reduce the amount of spam sent to Gmail, this > 550-5.7.1 message has been blocked. For more information, go to > 550 5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
