Could not open socket: TLS handshake failed

eliasnikolaibb

Reason: net::ERR_CERT_AUTHORITY_INVALID
The Vivaldi email client won't let me add my Proton mail. I could add my Gmail without any issues.
At first my issue was that Vivaldi does not support StartTLS with IMAP, but I worked around it by changing the IMAP and SMTP connections to SSL in Proton Bridge. Now I get an error I cannot resolve.

mib2berlin

@eliasnikolaibb
Hi, I cant test this but there is a big thread about:

https://forum.vivaldi.net/topic/73562/starttls-support/51?_=1678727519248#:~:text=Protonmail bridge works with Vivaldi e-mail now.

Cheers, mib

damianvincent

@eliasnikolaibb This is my frustration too, proton bridge will even let you download the cert for local use, but Vivaldi doesn't seem to have anywhere to upload the cert, even though your on your local network...

mib2berlin

@damianvincent
Hi, please check the thread I mention, user get Proton mail to work with Vivaldi:

https://forum.vivaldi.net/topic/73562/starttls-support/51?page=3#:~:text=FYI%3A Protonmail bridge works with Vivaldi e-mail now.

Cheers, mib

damianvincent

@mib2berlin Thank you for sharing the link, I was eventually able to get it to work, but it took a good bit of time and dedication on my part. The weirdest part was proton bridge allowed me to download two certs, but I could only upload the first one, not the key, into the trusted installer folder, but after like 20 minutes it just popped and started working, so I'm gonna take it. Thanks again for all your help!