As a mailspring user, I appreciate how the software allows for flexible account set up, various customizations, and even third-party VPN/Tor routing, using external software (orbot-like), which is quite enough for me to be content with its functionality on everyday use.
You may know that email providers such as protonmail, cock.li and numerous others, including more private and self-hosted ones, set up tor hidden services to “provide more anonymity”. I wonder if, perhaps, email hosts that support a hidden service could be set up in some way. Maybe, a PAC plugin will suffice. I’m not familiar with the code, just a thought.
It fails to authenthicate .onion IMAP service when I run it through TOR with proxifier on Windows 10, and produces no error log but its title:
(Originally posted by theoden8 on GitHub.)