Skip to main content


🚩🚩Breaking News🚩🚩

Microsoft Outlook is incorrectly filtering emails sent from tutanota.com addresses as spam. 🚫

Our technical support team has been in contact with them since November 16th and we have not seen any progress in getting this resolved. 🚧

This error only affects the tutanota.com domain.

If you encounter any errors when trying to send emails to any Outlook accounts, please create an alias using one of our other domains as a temporary workaround.

👉 tuta.com/blog/outlook-falsely-…

in reply to Tuta

Unfortunately I've found that's the case from microsoft. Tech leaders are trying to come together as a community are starting to come together in kind of a co-op. I've offered my tech expertise to Micorsoft many times to offer my support in helping them build stellar products but my offer has fallen on deaf hears.

It seems you have the best of intentions, Tuta. For that I applaud you! Keep at it! 👏 💪

in reply to Tuta

will you mitigate this by letting us send to outlook & hotmail emails with another of your other domains, even if we're not premium users?
This entry was edited (11 months ago)
in reply to Tuta

so when are we doing a mail-op strike? No mail to Microsoft or google until they comply with normal deliverability! #MailOperatorStrike #BlockGmail #BlockOutlook
in reply to Tuta

Even tho I own MS Office, I stopped using Outlook and switched to Thunderbird years ago.
in reply to Tuta

they will just decide that entire blocks of IP addresses are going to spam. Nothing housed in Azure or hosted by Outlook of course, nor any of the big email providers that could sue them.

And it’s a nightmare of automation and bureaucracy navigation to get a single mail server unblocked. Users will want to migrate to something “more reliable” like Outlook. 🙄

And even if you manage to get it unblocked, it can happen again.

Best wishes and good luck.

in reply to Tuta

Mail from tuta to office 365 business accounts do arrive.
in reply to Tuta

We're seeing the same issue on our side starting around the same time with similar non-answers from Microsoft support channels. I'm aware of a few other companies affected as well. For us its enough that the domain appears in the server name of any of the Received headers for the mail to be flagged as spam. We're also seeing the same when delivering to Talos hosted mailboxes, starting at the same time, so seems like there's a connection there between Microsoft and Talos
in reply to Tuta

also there is no way to mark a mail as "not spam" and let tuta remember it. my isp bills always go to spam, even though they just send plain text emails with just 2 or 3 lines of text.
in reply to Diabolic Preacher

@dpreacher You can whitelist these emails as not spam under Settings > Global Settings > Spam Rules.
in reply to Tuta

sadly that is nothing new.

#Microsoft literally weaponizes it's position as "#TooBigToFail" #eMail #provider and comstantly make up excuses like "no #SPF / #DKIM / #DMARC records" when they themselves don't comply with it.

Consider involving all #regulators you can ranging from #FCC to @EU_Commission to @BNetzA to forve Microsoft to stop this shite...

in reply to Tuta

When you say it only affects the tutanota.com domain, do you mean you have other domains it does not affect?

Because I assure you loads of people who have email on their own domain run into this Microsoft bullshit.

cc: @elfin

in reply to Tuta

Well you are also incorrectly putting all my Google Meet requests into Spam. 🤷‍♂️