bug#51733: 27.1; Detect impossible email addresses better

[Andreas Schwab]

On Jan 19 2022, Lars Ingebrigtsen wrote:

> Andreas Schwab <schwab@linux-m68k.org> writes:
>
>> On Jan 19 2022, Lars Ingebrigtsen wrote:
>>
>>> Consider somebody sending you an email containing @", characters in the
>>> name part, and then you decode the address, and then run the parsing
>>> function.  The attacker would then have a wide attack surface to trick
>>> the checker into checking the wrong parts of the address.
>>
>> Isn't that the whole point of textsec?
>
> It's perfectly valid to have a
>
> From: "larsi@example.com" <larsi@other.com>
>
> address.  It's unambigious, and the responses will go to
> larsi@other.com.

What's your point?

-- 
Andreas Schwab, schwab@linux-m68k.org
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