Erick Calder:
> On Sep 25, 2009, at 12:20 PM, Wietse Venema wrote:
>
> > Erick Calder:
> >
> >> this brings to mind: I've long used plussed addresses and love that
> >> feature but my only complaint is that many systems disallow the +
> >> sign
> >> in an e-mail address... is there a way to have a character bag work
> >> as
> >> the delimiter? i.e. any of a list of characters? (obviously a dot "."
> >> could also serve well as a delimiter since it's well accepted... but
> >> not as nice as + or /, or even -)
> >
> > It could be done. It would however be a pain to convert everything
> > from the current hard-coded assumption of a single delimiter, and
> > it would require an additional abstraction layer.
> >
> > However when you increase the number of delimiters, you can also
> > increase the number of table lookups.
>
> I don't think it would be so difficult. when the mail arrives, the
> local part of the address gets scanned for a set of characters (easy
> regex) and replaced with whatever postfix currently recognises as the
> delimiter. this way as far as postfix is concerned, there is still
> only 1 delimiter. of course, this assumes the user isn't going to
> segregate mail based on the delimiters (but I think that's fine)
You can't replace the delimiter. That would break other people's
transit mail, among many things.
What if one address matches more than one element in your delimiter
set? How do you know which one the author of the email address
intended to use? Postfix would have to try each alternative with
its virtual alias, canonical etc. lookups.
Wietse
