If you use a old server without TLS 1.2 enable, you get:

"Error performing TLS handshake: A packet with illegal or unsupported version was received."

See: https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1735837.html

There is a work around:

$ G_TLS_GNUTLS_PRIORITY="NORMAL:%COMPAT:+VERS-TLS1.0" evolution

but .... It's bette advise all.

Thanks

-- 
Dario Lesca
(inviato dal mio Linux Fedora 31 Workstation)