An alternative approach would be to admit that response handling at massive sclae is very difficult to get 100% right. Give the sender the benefit of the doubt that they are trying to do the right thing and attempt to reach someone who works there to see if they can help. You could try mailop, email geeks, maawg slack, linkedin, abuse@, support@. I bet you'd find someone willing to help correct the issue.
I work at sendgrid and manage response handling. If someone were to reach out with an obvious problem, I'd be willing and able to adjust our response handling appropriately. But it definitely feels better to just assume the worst and blast people on a community forum. Luke On Wed, Jun 21, 2023, 5:08 PM Sebastian Nielsen via mailop < mailop@mailop.org> wrote: > >> They were going to get a 4xx anyway. I changed the message to *help* > SendGrid. > > Yes but if you can change the message for SendGrid only, you can accept > the mail and let it through > > >> Where do I find out what the IP/domain is? Is it in my mail logs, > > Apparently you were able to send custom text to just SendGrid. > Then you have some rule to be able to differentiate SendGrid mail from > other mail. > Thus you just accept it. > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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