Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!snorkelwacker!bloom-beacon!eru!luth!sunic!mcsun!cernvax!chx400!poole From: poole@chx400.switch.ch (Simon Poole) Newsgroups: comp.protocols.tcp-ip Subject: Re: GOSIP from the grape vine Message-ID: <1990Jul11.101045.2459@chx400.switch.ch> Date: 11 Jul 90 10:10:45 GMT References: Reply-To: poole@chx400.switch.ch (Simon Poole) Organization: SWITCH Zuerich, Switzerland Lines: 27 In article beach@DDNUVAX.AF.MIL (darrel beach) writes: ..... > >There also seems to be the beginning of a plethora of so called >gateways to get from smtp based mail systems to X.400 based systems, >and might add full suite GOSIP x.400. Now just how the heck you map >some particular X.400 address to some particular user@host internet >address seems a little dicey. From what I've seen, it looks like >another big table to do the mapping. Has anybody implemented one >of these beasts and knows the definitive answer?? There are quite a few RFC987/1148 gateways out there (RFC987/1148 describe the mapping of X.400(84)/(88) to RFC822 and vice versa). Currently the tables which control the address mapping have around 600 entries. The main problem with them is not so much the size*, but the fact that changes to the tables and installation of them has to be globally coordinated. For example: in the RARE MHS project, installation of new tables happens every two months. *if you have a reasonable mapping strategy you can keep the number of entries per country to a sensible number, we have five (plus mappings for RFC822 top level domains: edu etc.), Germany ~180. -- ------------------------------------------------------------------------ Simon Poole poole@verw.switch.ch / poole@chx400.switch.ch / mcsun!chx400!poole ------------------------------------------------------------------------