Here's some background on what Proton Bridge does and why: https://news.ycombinator.com/item?id=36643124 https://news.ycombinator.com/item?id=36643124. The rec

Here's some background on what Proton Bridge does and why: https://news.ycombinator.com/item?id=36643124 https://news.ycombinator.com/item?id=36643124. The recommended way to send signed emails is to let Bridge do it for you; you can enable this with a setting in Proton Mail called "Sign external messages". Our goal is to make it easy to send and receive signed and encrypted emails. That's what Proton Mail is for. If you want to set up PGP signing and/or encryption yourself, a different service may be more suitable.