A breakdown of a DKIM replay attack

January 13th, 2022 in Engineering, Proton news

On 1 December 2021, we began receiving sporadic reports of delivery failures from protonmail.com addresses to Gmail. This corresponded with a dramatic decline in protonmail.com’s domain reputation as seen via Gmail Postmaster Tools and an increase in sending from known bad IP addresses. It was clear both from the bad sending IPs (mostly in Russia) …

2021 in review: An update from the Proton Engineering team

January 6th, 2022 in Engineering, Proton news

At Proton, our community is incredibly important to us. We exist only through your support, and we are here to serve you. As part of our commitment to you, we closely read the feedback you share with us directly and on social media platforms. We take your suggestions to heart and try our best to …

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