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Started in mid November and despite repeated requests from Tuta(nota) and reassurances from MS, it's still happening and MS have gone silent on the subject.
This is just another attempt by Micro$uck to make everyone use their email services. Micro$uck doesn’t want any competition, they want to rule the computer world
Well MS being anti competitive as usual. Side note, I like Tuta very much, finally an independent provider, but I would never use it as they don't provide IMAP/SMTP.
On my job, they use Microsoft as main workspace, so one time when they tried to e-mail me on my personal e-mail, i never received one, they always sent again to my protonmail....
IDK why Microsoft does it.. but now it makes me think Microsoft is even more evil than i thought
It's possible that your work has problems with spam and has thus set up their own spam filter and that filter might be more aggressive.
There are also ways to change the spam filtering in m365 mail.
It's also possible that your work hasn't setup mail properly and protonmail is the one that rejects the mails. We had an issue at work where OOF auto replies didn't work to external gmails (and probably others) because Gmail rejected the emails (I had confirmed that Gmail was the one that rejected it via the email traces in exchange). That wasn't Microsoft's fault.
I can send stuff to my proton mail without issues from two different Microsoft 365 mails.
One missed email should not be interpreted as malicious intent. It's also honestly quite likely someone just misspelled or something.
Those are the good providers. If there were another good provider and this is being done with intent than they will just block that domain as well. I use a custom domain with proton, I think that would protect against this but maybe some folks more engaged could chime in before you take that as advice.
It's not about us. It's about the rest of the world, a large portion of whom uses M365. These blocks mean we can't communicate with potential employers, family, government institutions, universities, etc.
Here I am, maintaining several block lists (max of 500 entries per list) on our M365 tenant of spam and phishing domains and addresses, and not a one comes from Tuta, Proton, or any other privacy provider. Nearly all are gmail, outlook, and icloud, with a few customs sprinkled in. Their claim that it's to fight spam is BS.