rwhite@nusdhub.UUCP (Robert C. White Jr.) (11/28/87)
Hi, I need the yacc and lex definitions for mail headers. I don't know enough to ask correctly [by number] for what I want. If the yacc and lex grammers are not available, but there is a source, or someone can tell me where [provide me with] the definitions in plain text, I would be grateful. Basically I need to _prevent_ some machines on our hub from mailing to others. The routing is not so much the point, but I need to be able to burst the headers destined for rmail, and preform surgery on some. The real issue is that we have some destinations which _do_ wnat mail, but only from certain sources, so I need to become a guardian for these sites. Rob.