That's weird ...but it shows that the problem is in acs-mail-lite. You have definitely some older version installed, since the traceback above shows that "acs_mail_lite::smtp" calls "eval $cmd_string", which is not the case in current versions, which use a catch operation . The "originator" field causing the problem is determined in  and passed as last argument to "acs_mail_lite::smtp" and uses "acs_mail_lite::bounce_address".
It looks to me, as if in your installation, the bounce prefix (parameter EnvelopePrefix of package acs-mail-lite) is not set correctly (look under /acs-admin, you can see/change the parameters of the installed services there). The parameter should have a value like e.g. "bounce".
The versions of OpenACS and the installed packages are listed by the package manager (/acs-admin/apm/). For OpenACS, this looks currently like the image below.
Hope this helps