I’m accessing my Gmail account from behind HTTPS proxy – it was described is this post.  Thunderbird does not support it, for IMAP and SMTP  only SOCKS proxy can work.   To cope with it  I’m using a small local proxy, that redirects any connection via proxy CONNECT method to remote host:port.

This works fine, but in email client I had to set IMAP server as localhost and SMTP server also as localhost.  Thunderbird is cautious about it and since both connections are using TLS/SSL then there is a security issue –  I’m connecting to localhost, but certificates are  for *.gmail.com domain.  Luckily Thunderbird enables me to set security exception –   it asks me if I’ll allow that certificate for that host address, if I confirm everything works like charm until Gmail changes certificate on servers (which happens about couple time per year or so). Continue reading Why GMail is not changing all server certificates in synch? →