IPv6 isn't SMTP

Thu Mar 27 14:04:41 UTC 2014

Hi,

On Thu, Mar 27, 2014 at 01:52:27PM +0000, Tony Finch wrote:
> John Levine <johnl at iecc.com> wrote:
> >
> > There are also some odd things in the spec.  For example, according to
> > RFC 5321 this is not a syntactically valid e-mail address:
> >
> > mailbox@[IPv6:2001:12:34:56::78:ab:cd]
> 
> You aren't allowed to use :: to abbreviate one zero hexadectet according
> to RFC 5952.

well, RFC 5952 _recommends_ against using that. Still, it's perfectly valid as of RFC 4291 and the approach can be found in quite large vendors' implementations, see http://labs.apnic.net/blabs/?p=309.

RFC 5952 explicitly states:
"all implementations must accept and be able to
   handle any legitimate RFC 4291 format."

best

Enno

> 
> http://www.rfc-editor.org/errata_search.php?eid=2467
> 
> Tony.
> -- 
> f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
> Malin: East 5 or 6. Moderate or rough, occasionally very rough in northwest.
> Showers. Good, occasionally moderate.
> 

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