same issue here after upgrade bullseye -> bookworm Debian bookworm
My XMPP-server is running ejabberd 23.01-1~bpo11+1 echo 'test' | sendxmpp -t -a /etc/ssl/certs/ -u <jabber-user> -j <jabber-server> -p <password> -s "test1" <jabber-address> gives same output as OP posted. from apt history: 2023-04-04 dist-upgrade libnet-xmpp-perl:amd64 (1.05-1, 1.05-1.1) libxml2:amd64 (2.9.4+dfsg1-7+deb10u5, 2.9.10+dfsg-6.7+deb11u3) 2023-04-10 15:07:07 libnet-xmpp-perl:amd64 (1.05-1.1, 1.05-2) 2023-04-24 libxml2:amd64 (2.9.14+dfsg-1.1+b3, 2.9.14+dfsg-1.2) markus
