Can't connect to mail.autistici.org
I'm using the riseup.net VPN app from f-droid, although I experience similar behavior with Calyx VPN app too. For some reason, I can't connect to mail.autistici.org with either K9 Mail or netcat in Termux.
The connection just times out.
Connecing to riseup's mail server works fine.
This might be related to ipv6, but I'm no sure.
I'm on Adroid 8.1.