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Gmail has a "send feedback" button on most pages. Submit complaints there.
You need to set up a DKIM record to validate your domain. If you are using proton free without your own domain, there's nothing you can do.
I have both for years, and never had a single Proton email go to gmail spam. Both personal gmail and a corporate Google Office account.
If it's a custom domain, it's likely a DKIM issue. Otherwise, this sounds like an issue with the recipient having previously marked an email from Proton as spam.
Hmm, it is not custom domain
Hm. Well, either you've been flagged by someone else, or may be just the unlucky recipient of a wrongful profiling back when Proton was new. But it seems to me that it's an individual problem, either your email address in particular, or your recipient.
If it were me, I would have a couple friends with gmail go and specifically mark my address as safe and trusted. Especially anyone that has your emails sent to spam.
Beyond that, maybe email some Google support and ask to be white listed.
I don't have this issue with proton either but I can't imagine that's the best solution. I can't exactly tell my insurance or customer service at a company to whitelist my email.
Why not?
If their email servers are flagging you incorrectly, correct them. Worst case scenario, nothing changes.
I apparently haven't had that issue. Are you using a @proton.me address, or your own domain? I've been using my own domain (set up with all the tricks they tell you to use) and it seems to go through without issue.
I have a custom domain set up on proton for my business, and I haven't had issues either. My personal @protonmail.con address hasn't had problems. I think this is typically an issue when setting up a local mail server, and gas something to do with security certs.
I don’t have proton mail but I have non Gmail.
So, the good thing is, your emails are showing up and not disappearing into the ether like Microsoft.
Have your recipients add you to their contact list and mark you repeatedly as not spam. It may also be good to have them reply to your email.
It’ll take a bit but you’ll end up in the good side
So, the good thing is, your emails are showing up and not disappearing into the ether like Microsoft.
We had this at work. B2B emails, going from paid Exchange customer to paid Exchange customer. Emails just disappeared without even showing up in junk. Sending email logs showed the email was accepted.
I don’t know the specifics of being a paid Exchange customer.
From my experience, I had to switch three servers. Domain and IP reputation seem to mean a LOT to Microsoft. You can’t be on a blacklist. There are blacklists in which you can request to be removed from - Microsoft doesn’t care.
Also, without setting up all the stuff you didn’t need to do 10 years ago, Microsoft also silently sends your email into the ether: DKIM, DMARC, SPF…
It’s infuriating, especially since they run a lot of the enterprise email hosting.
it's by design, those are harassment tactics. there is no way that you can add a correspondent as "safe" and someone you want to receive comms from, even if you've communicated before and/or you have them in your address book. they want you to use gmail, not email.
I'm fed up with gmail requiring an "app-specific" password for Outlook. Not some crusty old 2007 version, the 2021 LTSC version.
Doesn't require an app-specific password from its own app on android, oh no.
That's because Outlook doesn't support Gmail's authentication mechanism. Has nothing to do with favouritism. The app-specific password is a workaround offered by Gmail for legacy apps.
this post was submitted on 28 Jun 2025
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Privacy
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