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Email Provider Tutanota Says AT&T Is Blocking User Access

'Such outages demonstrate how much power ISPs...are having over our online experience, and it is shocking,' according to the German email provider, which says the situation underscores the need for net neutrality protections.

 & Michael Kan Principal Reporter

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An encrypted email provider is calling out AT&T for blocking user access to the company’s website and app.

Since Jan. 25, Tutanota has been receiving complaints from some US-based users, who say they’ve been unable to access their inboxes on AT&T’s mobile connections.

“As AT&T has not fixed the issue after more than two weeks, we are reaching out publicly in the hope of getting the attention of the right people at AT&T,” Tutanota wrote in a blog post on Thursday.

The email provider is based in Germany, so it hasn’t been able to confirm the problems firsthand. However, Tutanota told PCMag AT&T customers based in Chicago, Omaha, and St. Louis have all reported the connection errors.  

The email provider also claims AT&T is aware of the issue; Tutanota points to a tweet the carrier posted on Feb. 5, in which it said "Our team is investigating, but they need more information."  

AT&T did not immediately respond to a request for comment. So it remains unclear whether the blocking is intentional or a bug. However, PCMag was able to access Tutanota on an AT&T mobile connection in California.

AT&T's slow response, however, has prompted Tutanota to say the whole situation underscores the need for net neutrality protections in the US.

“Such outages demonstrate how much power ISPs (internet service providers) are having over our online experience, and it is shocking,” the email provider said. “If ISPs can block access to certain websites or services, they control the internet. It would be naive to believe that American ISPs will not use this power. Without net neutrality ISPs can —and will— ask for extra fees.”

In late 2017, the FCC voted to repeal Obama-era net neutrality rules, which were designed to prevent ISPs from throttling internet access to websites based on their content. Current FCC Chairman Ajit Pai has defended the repeal, claiming the Obama-era rules were saddling the internet industry with “heavy-handed regulations" that threatened to stifle investment and innovation. 

To prevent ISPs from engaging in content blocking and speed throttling, the FCC has handed off enforcement to the US Federal Trade Commission.

As for Tutanota, the company is recommending affected customers on AT&T use a VPN service or the Tor browser to get around suspected blocking.  

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About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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