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But the best solution is often simply to block the sender, as shown below. When you block a sender, they won’t be informed that they’ve been blocked. How to block a sender using Proton Mail on the web How to block a sender using the Proton Mail apps for iPhone or iPad How to block a sender using Proton Mail’s advanced sieve filters How to block a sender using Proton Mail on the web Sign in to your Proton...