Microsoft Edge's SmartScreen is flagging ProtonMail's website as malicious

Aug 2, 2022

Recently, ProtonMail experienced an outage spread across three days that prevented users from accessing their inbox. Now, some users have a similar issue, as Microsoft Edge's SmartScreen is blocking them from viewing their mails.

Microsoft Edge's SmartScreen is flagging ProtonMail's website as malicious

In case you didn't know, Proton rebranded its services under a unified branding called a couple of months ago. While your email address remains the same (e.g. [email protected]), the website itself has moved to Proton.Me. If you try to visit, it will redirect you to

Microsoft Edge's SmartScreen is flagging ProtonMail's website as malicious

Try to visit in Edge, it will load the page normally. This applies to most of the links on the site, including the login portal, You can sign in to your account too, but that's where the issue occurs. If you try to access, you will be greeted by a red screen with a warning that reads,

"This site has been reported as unsafe Hosted by Microsoft recommends you don't continue to this site. It has been reported to Microsoft for containing phishing threats which may try to steal personal or financial information."

When a user sees a message like that, they could panic and assume that the website has been hacked or infected with malware. That's how SmartScreen is designed to work.

The website for the company's cloud storage service, Proton Drive, is also impacted by the issue. On the other hand, Proton Calendar and ProtonVPN's websites seem to be unaffected. Proton Status' website only shows some issues related to the company's VPN services, i.e., the e-mail service is fully operational.

So, the question is has Proton been hacked?

No. Proton says that a bug in Microsoft Edge's SmartScreen is flagging the URLs incorrectly, and that it has contacted the Redmond company to fix the issue. Proton also took a cheeky swipe at Microsoft Edge by recommending users to use a different/better browser, as a workaround.

Microsoft Edge'is blocking ProtonMail's website

Speaking of other browsers, I had no trouble accessing ProtonMail in Firefox, Safari, Vivaldi, Waterfox, and Chrome. They all load the same servers, so this problem is isolated to Edge, and not limited to the OS, i.e. when I tried to access it, Edge blocked the sites in both Windows and macOS.

I don't think it is a good idea to disable SmartScreen, because you never know when a website could really be dangerous. If you really need to access your inbox in Edge without turning the security feature off, visit Proton's site, and then click on the ! Dangerous icon in the address bar. Select the button that says "Show unsafe content", and it should load your inbox. The issue is, you will have to do this every time you access the site.

Warning: I wouldn't advise following the above method every time you run into blocked sites, for security reasons.

On a sidenote, the Proton Drive app for Android is now available on the Google Play Store for beta testing. The iOS app's beta program The Per the roadmap which we wrote about, Proton Drive for Windows and iOS

Do you use ProtonMail in Microsoft Edge?

Microsoft Edge's SmartScreen is flagging ProtonMail's website as malicious
Article Name
Microsoft Edge's SmartScreen is flagging ProtonMail's website as malicious
Microsoft Edge is blocking ProtonMail's website. The browser's SmartScreen is flagging the webpage as malicious.
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  1. JMGG said on January 19, 2012 at 8:25 am

    You said that Outlook isn’t your main email client, so which is your main one?

    1. BalaC said on January 19, 2012 at 9:42 am

      I think its thunderbird

    2. Martin Brinkmann said on January 19, 2012 at 10:15 am

      It is Mozilla Thunderbird.

  2. Salaam said on September 24, 2012 at 9:52 pm

    Awesome! This actually solved my problem… what a stupid bug.

  3. Claud said on December 19, 2012 at 2:08 am

    If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.

    1. Lynda said on February 12, 2013 at 3:37 pm

      THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!

    2. Chad said on November 20, 2018 at 4:24 pm

      Solved my issue! 6 years later and this is still problem…

    3. Ivan X said on January 21, 2021 at 4:50 pm

      Fantastic. Thank you. Size did the trick.

  4. Andrew said on October 26, 2013 at 7:06 am

    This solved my Outlook problem, too. Thank you. :)

  5. Charles said on December 7, 2013 at 7:23 pm

    Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.

  6. garth said on November 7, 2014 at 7:13 pm

    You are a god – thank you!

  7. Faisal said on February 9, 2015 at 10:09 am

    thanks a lot…. work like charm.. :-)

  8. Simon said on March 24, 2015 at 11:36 pm

    Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers

  9. Olu said on April 14, 2015 at 1:35 pm

    Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
    Thank you

  10. Coenig said on July 23, 2015 at 7:36 am

    Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)

  11. Fali said on January 20, 2016 at 4:19 pm

    Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.

    1. MIki said on January 10, 2019 at 11:54 am

      I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!

  12. Christina said on January 20, 2016 at 6:14 pm

    Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007

  13. Oz said on July 22, 2016 at 3:20 pm

    Great tip! Thanks!

  14. Tracy said on September 1, 2016 at 4:48 pm

    Worked for me, too – thank you!!!

  15. shawn said on September 9, 2016 at 10:25 am

    It’s Worked for me, too
    thank you very much!

  16. Jari said on October 31, 2016 at 11:53 am

    I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!

  17. Michel H said on November 30, 2016 at 11:08 pm

    Thank you so much. Solved!
    Considering you published this in 2012, incredible not been debugged by Microsoft.
    Thank you again. M

  18. Ziad Bitar said on January 9, 2017 at 2:00 am

    This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.


  19. Anonymous said on February 15, 2017 at 5:24 pm

    Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.

  20. Rochelle said on March 6, 2017 at 11:59 am

    Thank you, this worked !!!!

  21. anom1234 said on May 20, 2018 at 11:20 pm

    Man, you are a fucking god. Thanks a lot, what an annoying bug!!

  22. JC said on October 12, 2020 at 2:14 pm

    Awesome, this post solved the issue. Many thanks!

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