Two observations:
1. Your SPF record ("v=spf1 a mx ?all") is not optimal. While technically
correct, the neutral qualifier ("?") isn't a great signal these days. I would
suggest you use the softfail (~) qualifier for the default policy, e.g. "v=spf1
a mx ~all". It is best current practice to make an assertation that you don't
approve of non-listed senders.
2. Your sending domain (rafa.eu.org) is a sub-domain of a pseudo-TLD which a)
gives sub-domains away for free, and b) has an overly permissive SPF policy
("v=spf1 +all"). The reputation of your sub-domain is going to be influenced by
the reputations of the base domain and all of the other sub-domains.
While I understand the legitimate frustrations that some of the providers' ML
algorithms struggle with legitimate micro-senders, I think your specific
problems are (in part at least) connected with your sub-domain.
I would suggest that you great a real domain, DKIM sign with that domain, have
a responsible SPF record, and as was suggested previously on this list, send
DMARC aggregate reports to increase your sending footprint.
Ken.
> -----Original Message-----
> From: mailop <mailop-boun...@mailop.org> On Behalf Of Jaroslaw Rafa via
> mailop
> Sent: Monday 20 September 2021 13:17
> To: mailop@mailop.org
> Subject: [mailop] Gmail putting messages to spam
>
> I want to return to an old issue, which repeatedly happens again and
> again, that is, Google putting emails from me to recipient's spam
> folder. What's absurd, this happens not only to Gmail addresses to which
> I am writing for the first time, but also to recipients with whom I have
> previously corresponded and who marked my messages as non-spam. It even
> happens when I'm replying to a message I got from a Gmail user, which is
> totally absurd!
> It can even happen in a middle of an email exchange - ie. I have once
> exchanged a few messages with a Gmail user without problems, then
> suddenly one of my subsequent messages in the conversation went to Spam.
>
> This is really annoying and makes me mad. Can't Google really do
> anything about this? I have NEVER, EVER sent any spam from this address.
> I am NOT a bulk sender at all - I send only purely personal messages,
> and there are very few of them. I don't send on behalf of any third
> parties. SPF, DKIM, DMARC, rDNS is all correct - I sent a few test
> messages to test Gmail accounts I have created and Google displays
> everything as "PASS".
>
> There is absolutely no reason to classify me as a spammer. And it seems
> that this classification is based purely on my sender address or domain,
> because when I send from the same server, from the same IP address
> messages with sender address from a different domain, they arrive to
> Inbox without issues. So it's not a matter of "bad" IP reputation. It's
> a matter of my particular address/domain. Why Google dislikes it so
> much?
>
> I am even afraid to send anything to mailing list like this, because
> many recipients here may be on Gmail, and when they receive my message
> it will go to their Spam folders and they won't see it, so Google's AI
> will have even stronger signal that I'm a "spammer" and put more of my
> messages to spam...
> Seems to be a hopeless loop, is there any way out of this?
> --
> Regards,
> Jaroslaw Rafa
> r...@rafa.eu.org
> --
> "In a million years, when kids go to school, they're gonna know: once
> there was a Hushpuppy, and she lived with her daddy in the Bathtub."
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> https://list.mailop.org/listinfo/mailop
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