The author jumps to an unfounded conclusion which is pretty irritating and probably will make everybody who could help him not want to help him.
That said I've never seen a DSN like the one in the screenshot. It certainly is not generated by the gmail spam checking system, because gmail does not bounce spam. Gmail either rejects spam at SMTP DATA time, or delivers it to spam folders.
> Gmail either rejects spam at SMTP DATA time, or delivers it to spam folders.
This is a million times better. Meanwhile, microsoft accepts it, sends it at passed on DMARC reports, but discards the mail silently without it even reaching the spam mailbox.
> The author jumps to an unfounded conclusion which is pretty irritating and probably will make everybody who could help him not want to help him.
Apologies if you took it as a conclusion, it was only hand waving speculation, but google does have an incentive to make it difficult for the little guy...
> Gmail either rejects spam at SMTP DATA time, or delivers it to spam folders.
They do if you have DMARC enabled, and a REJECT policy, although they still seem to ignore it sometimes and I have no clue my mail is sitting in a spam box.
It's entirely true that Gmail accepts mail at much higher rates than other major ISPs, and that their default handling of unwanted mail is to place it into the spam folder - but the truth is they can and will bounce mail if it's bad enough. It's just extremely uncommon for most people - even email marketers - to ever run into a situation where that happens.
That said I've never seen a DSN like the one in the screenshot. It certainly is not generated by the gmail spam checking system, because gmail does not bounce spam. Gmail either rejects spam at SMTP DATA time, or delivers it to spam folders.