[Bug] Sieve vacation :addresses match only case-sensitive?

[Roger Klorese]

>
> It is not recommended to rely on local-part case, but it is indeed
> case-sensitive.
>
> And this is to avoid such issues that postfix supports address
> cleanup/canonicalisation before forwarding mails to dovecot.
>
> ----------
> RFC 5321:
>
> "Local-part     = Dot-string / Quoted-string ; MAY be case-sensitive
> […]
> While the above definition for Local-part is relatively permissive, for
> maximum interoperability, a host that expects to receive mail SHOULD avoid
> defining mailboxes where the Local-part requires (or uses) the
> Quoted-string form or where the Local-part is case-sensitive."
>
>



And therefore “receive liberally” policy that wants to assume
case-insensitivity should single-case the address IN THE COMPARISON.

>
>
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