On Tue, Jan 07, 2014 at 04:27:24PM +1100, Mark Andrews wrote:
> > I don't think so? The "+" sign as magic "this is the same user as"
> > is also not a feature supported by all SMTP servers or specified in
> > a standard, correct? And people might want to use different keys for
> > paul+personal versus paul+ietf.
>
> And this is not a decision that needs to made by us. This is a decision
> that should be made by the publisher of the data. One could even have
> a rule which says "if *+* try as is and on nxdomain try /\(*\)+*/\1/"
Sorry, CMU-style address extensions are a local matter entirely
outside the world of email standards. On some domains "+" is
special, on other domains "-", and others still some other convenient
character not used in real email addresses.
It is not possible to handle these without substantially complicating
the logic. One would have to query the domain for the domain's
recipient delimiter first, and then for the address.
--
Viktor.
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