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In article <2033@brl-smoke.ARPA> zben@umd5.ARPA writes:
>Subject: Re: Problems with Janet and Bitnet
>References: <1942@brl-smoke.ARPA>
>Reply-To: zben@umd5.UUCP (Ben Cranston)
>Organization: University of Maryland, College Park
>
>In article <1942@brl-smoke.ARPA> SLG6M%USU.BITNET@WISCVM.arpa writes:
>
>> Help!  I have been trying without success for the past two weeks
>> to send a mail message to Nigel Holder at Marconi Research.  I
>> am connected to Bitnet, which allegedly has the capability to
>> send mail to JANET via a gateway at a Bitnet node called UKACRL
>> in London.  It gets to London via Bitnet OK, but then I keep getting
>> "YF21@UK.CO.GEC-MRC.U Is an invalid assress. No delivery made."
>> mailed back to me?  Any ideas a) what's going wrong here, and b)
>> how do I send a message to Nigel?

>b: I would suggest you use the other address:
>
>   yf21%u.gec-mrc.co.uk@ucl-cs
>
>   that Nigel advertises in his .signature.  Note that the British net uses
>   backwards domaining, and that ucl-cs reverses it for you while ukacrl
>   does not.   

The address "u.gec-mrc.co.uk" doesn't, in fact, exist!  Maybe there is a typo
in his signature file for there are a few other addresses very similar that do
exist.  Indeed, some with only 1 letter different.  Send me his signature file
and I will try to help you!

As postmaster of a machine on JANET, I will try to put the record straight.
There are 3 gateways onto JANET/PSS. (JANET addresses are "*.ac.uk" and PSS
address are "*.co.uk".  "ac" = "academic-community", "co" = "commercial
organisation".)

The gateways are as follows:

UUCP:	...!seismo!mcvax!ukc ... also known as ukc.ac.uk
	This gateway maps UUCP names onto the equivalent JANET/PSS ones.
	Mail may only be sent to/from authorised JANET/PSS *sites* if the other
	site is outside the UK.  The JANET/PSS site *must pay* for *incoming or
	outgoing* mail!

ARPA:	cs.ucl.ac.uk ... also known as ucl-cs.arpa
	Only authorised JANET/PSS *users* can send mail through this gateway.
	Mail can be sent to JANET hosts free of charge.  I'm not sure about
	mail to PSS sites.  This gateway does not recognise UUCP names!

BITNET/EARN/NORTHNET:	UKACRL (ukacrl.earn) ... also known as earn.rl.ac.uk
	This gateway is free in both directions!  Does not recognise UUCP
	names.

>Also note that there was a five-part SENDMAIL patch system posted to 
>mod.sources some time ago.  I printed it off but quite frankly do not know
>enough to pick out which gateway it finally ended up using out of the mass
>of stuff posted.  The ID coordinates were: 1636, 1638, 1639, 1642, and 1643
>at "panda.UUCP".  They were submitted by:
>
>    Jim Crammond <seismo!mcvax!cs.hw.ac.uk!jim>

I must personally vouch for this package.  It is excellent and is used by the
majority of UK sites that handle mail properly.

Finally, every UUCP site in the UK has a domain name which is mapped by
ukc.ac.uk.  Not all these are registered with the UK central registry (called
the "NRS" = "Name Registration Scheme").  Those that are not registered will
only be addressable by the ukc.ac.uk gateway.  Those that are will also be
addressible from cs.ucl.ac.uk (and by earn.rl.ac.uk within a "reasonably short
time period").  Also, most sites registered in the NRS do not have a UUCP name.
The "u.gec-mrc.co.uk" machine is not in either the UUCP or NRS tables.
-- 
EMAIL:	stephen@comp.lancs.ac.uk	| Post: University of Lancaster,
UUCP:	...!mcvax!ukc!dcl-cs!stephen	|	Department of Computing,
Phone:	+44 524 65201 Ext. 4120		|	Bailrigg, Lancaster, UK.
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