mcabber is a console based Jabber/XMPP client. It supports GPG and OTR end to end encryption. It also supports XEP-0280 - Message Carbons, so it will receive all messages if you use multiple clients (which must all support XEP-0280).
A default configuration file is included with mcabber, and you can also check out the latest defaults on github. Here are the settings you should use for jabber.at:
# Your full JID set jid = email@example.com # Set the password if you wish, otherwise mcabber will prompt you #set password = ... # General security settings (These are the default anyway) set tls = 1 set ssl_ignore_checks = 0 # We don't recommend you set the Fingerprint: Since we use Let's Encrypt, # certificates are renewed every two to three months. #set ssl_fingerprint = ... # DO NOT SET THIS: mcabber is able to figure out server and port by itself. #set server = ... #set port = ...
mcabber APT repository
If you use Debian/Ubuntu, we maintain an APT repository with the newest version of mcabber.