Allow login username to be different from email and aliases
You can effectively make your login username a barrier from even giving hackers a starting point to get into your account. Since with this feature they would need to know your username first. This should squash any determine hacker and allow great protection to long term protonmail accounts for years to come. Thoughts of "working on hacking this account may take time" is diminished wouldnt ya say?

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Someone commented
A basic privacy and security thing to do would be to not give away any login credential information to anyone...
But of course if everytime we send an email (main address or not) we also send half of our login credential to the recipients, then something have failed in the whole idea to create a private and secure service!
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Dave commented
100% agree, and I can't believe that it hasn't been implemented already! It would really add a lot of value and security to Protonmail's offering
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익명 commented
This is really necessary. Widely used email addresses are vulnerable to hacker attacks.
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익명 commented
This is great idea!
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Michael Miltenburg commented
Yes this would be nice. Also separate protonvpn account from protonmail account so I can let my roomate use my vpn without giving him access to my email.
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Anonymous commented
Please add this feature!
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Anonymous commented
In addition, existing users should be able to change their username since it wouldn't be tied to an email address anymore.
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Anonymous commented
This feature is currently available on Outlook.com and I find it very useful. It would be win-win update for ProtonMail and its customers: it should reduce the volume of hacking attempts.
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Anonymous commented
This seems like an excellent measure as it denies an attacker a meaningful starting point.
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Tunafish commented
Fantastic idea. Such basic opsec should be so obvious but we're all trained monkeys on GMail these days.