email edit

[Jay R. Ashworth]

On Sun, Nov 11, 2007 at 08:38:22PM -0500, Fairlight wrote:
> When asked his whereabouts on Sat, Nov 10, 2007 at 08:19:34PM -0500,
> J. P. Radley took the fifth, drank it, and then slurred:
> > 
> > Am I wrong that FQDNs cannot contain '_', '+' or '%' ?
> > If so, rhsc ought not be identical to lhsc.
> 
> TTBOMK, you are correct.  Although there's a somewhat depricated address
> scheme of user%host1 at host2 that has to be accomodated -somewhere- if one
> truly wants full 822 compliance.  I haven't seen anyone use that in years,
> though--like over a decade.

No, the percent-hack is pretty much dead.  But that was LHS, and the
domain name is RHS.

> As I remember it, FQDNs can only contain [A-Z][a-z][0-9] and "-", as well
> as their period delimiters.  Of course, they used to only be able to be 25
> characters per segment, and I've seen that rule broken several times since
> 1998.  ICANN must have relaxed something at some point.

Along with "domain names must start with a non-numeric character" rule,
relaxed (pretty much at gunpoint) when 3com wanted a domain.  :-)

The version of this I posted was a 95% hack; I propose to clean it up a
bit as I go and then submit it.

Cheers,
-- jra
-- 
Jay R. Ashworth                   Baylink                      jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com                     '87 e24
St Petersburg FL USA      http://photo.imageinc.us             +1 727 647 1274