dovecot - Sep 2019 - Bug] Sieve vacation :addresses match only,>, case-sensitive?

Hi,
>> I never saw any mail system in which the local Part ist Case sensitive!
> 
> Every Unix/Linux system (I?d say that represents the majority of mail
systems) has a case sensitive local part. Most mail admins have set their
systems up to normalize all users on lowercase names, but that is not and has
not always been the case.
at least in every large installation LDAP User Backend's (or AD or
similar) are used, and they are definitly case insensitive for the CN or
UID attributes. Really nobody who cares about his systems and users uses
mailboxnames which just differ in case (too much danger of confusion!)

At least sieve must reflect the same settings as the MDA, so if the MDA
is set to downcase (which in my opionion is the only valuable setting)
sieve must also downcase.

Sincerly,
Klaus

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