开云体育

UKenGB,

However, as someone else mentioned, although Google (and other email
providers) might see it as their right to be able to subvert the
standards ...

It isn't a case of subversion. Gmail's usage is compliant with the standard.

From rfc5322:

3.4.1. Addr-Spec Specification

An addr-spec is a specific Internet identifier that contains a
locally interpreted string followed by the at-sign character ("@",
ASCII value 64) followed by an Internet domain.
...
The local-part portion is a domain-dependent string. In addresses,
it is simply interpreted on the particular host as a name of a
particular mailbox.

There is nothing in the specification requiring that two different spellings of a local part either SHOULD or MUST represent different mailboxes.

And in fact aliased addresses are quite common. Yahoo Mail, as one example, has the "disposable email address" feature which allows a user to create many aliases for their own mailbox.

But can they be absolutely sure that no-one else operating those
servers might also try to get clever clever in a way that conflicts
and then it all breaks down. The only way email works

Yes, that domain owner can be absolutely sure. No other server gets to decide which mailbox corresponds to a given local part in their domain.

In the example we're discussing, the user of one of those addresses is
under the mistaken belief that the dot makes no difference and hence
takes no care when entering their email address to be stored somewhere
and may or may not include the dot.

Nonsense.

We've no idea what beliefs the other person may have held. And in any case whether she'd used mizelly or miz.elly the result would have been the same: mistaken delivery to Ellen. The dot was not a factor in what happened in Ellen's case.

Shal


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