[. . .]
>* TAMU Sociology majors
>*
>* Subscription= Open
>* Send=         Public
>* Review=       Public
>* Confidential= Service
>* Service=      Local
>* Reply-To=     List
>* Notify=       No
>*
>* Owner= [log in to unmask]         Rogelio Saenz
>* Owner= Quiet:
>* Owner= [log in to unmask]    Rogelio Saenz
>
>So which setting prevents his list from accepting non-tamu email addresses
>in subscription?

Service= Local is doing that.  Appendix B of the Site Manager's Manual says:

| +--------------------------+
| | Service= area1,area2,... |
| +--------------------------+
|
| This keyword is not available in LISTSERV Lite.
|
| Defines the 'service area' outside of which subscription requests must not
| be accepted.  [etc]

The listowner can still add non-local addresses.

Thanks,
--
Jacob Haller, Technical Support
L-Soft international, Inc
http://www.lsoft.com/