On 2017-07-17, at 08:06, R.S. wrote:
>>>
>> By Internet standard, the domain is case-insensitive. RFC 822 et al.
>> leave interpretation of the local-part entirely to the target site,
>> which is free to treat it as either case-sensitive or insensitive.
>
> Theoretically yes, but practically I have never met case-sensitive email
> address, even the part before @ character.
> Of course this is very subjective, limited, 22-years old observation, not a
> rule. YMMV ;-)
>
https://en.wikipedia.org/wiki/Black_swan_theory
And many user interfaces transform case of email addresses, willy-nilly.
On 2017-07-17, at 05:58, R.S. wrote:
> ...
> 3. (next level of complexity). Provide "exceptions" for multiple-domain
> companies
> Example:
> [email protected]
> [email protected]
> [email protected]
> are equal.
> I have no idea here :-(
>
The same quandary applies to case-sensitivity.
BTW, I checked, and all three domains you mention exist and have
similar MX records.
-- gil
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