I think I figured it out. I have to use it with tcpclient. Something like tcpclient jabber.org 5222 ./sj -u johndoe -s jabber.org perhaps.
- [dev] sj: ucspi Greg Reagle
- Re: [dev] sj: ucspi Greg Reagle
- Re: [dev] sj: ucspi Teodoro Santoni
- Re: [dev] sj: ucspi Matthew of Boswell
- Re: [dev] sj: ucspi Greg Reagle
- Re: [dev] sj: ucspi Greg Reagle
- Re: [dev] sj: ucspi Matthew of Boswell
- Re: [dev] sj: ucspi Greg Reagle
- Re: [dev] sj: ucspi Matthew of Boswell
- Re: [dev] sj: ucspi Jan Klemkow
- Re: [dev] sj: ucspi Jan Klemkow
- Re: [dev] sj: ucspi Matthew of Boswell