Le 4 sept. 2019 à 19:37, Roger Klorese via dovecot <dovecot@dovecot.org> a écrit :

On Wed, Sep 4, 2019 at 8:25 AM Philipp Faeustlin via dovecot <dovecot@dovecot.org <mailto:dovecot@dovecot.org>> Further investigation showed me that it has to be a bug.

I tested with Dovecot 2.2.36.3 (a7d78f5a2), Pigeonhole version 0.4.24 (5a7e9e62):

In this version the additional addresses in vacation :addresses ["test@example.com <mailto:test@example.com>"] are handled case-insensitive.

In the new version: Dovecot 2.3.7.2 (3c910f64b), Pigeonhole version 0.5.7.2 (7372921a) installed via https://repo.dovecot.org/ <https://repo.dovecot.org/>, (same sieve, same configuration) these addresses are handled case-sensitive.

The case-sensitive matching of mail addresses, doesn't make any sense to me.

Could someone confirm this behavior?

Isn’t RFC-compliant behavior to treat the local part as case-sensitive and the domain-part as case-insensitive?

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."

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.

The local-part MAY be case-sensitive, but in general I don't know any mail addresses where the case matters. Thus it is hard for me to understand, why this comparison of the vacation address is case-sensitive. Whether the final recipients address is also treated case-insensitive.

If this has to be case-sensitive to be RFC compliant, then please create an option for admins or users to change the behavior to an case-insensitive comparison.

Am 09.09.19 um 15:58 schrieb Sami Ketola:

...

On 9 Sep 2019, at 16.17, Philipp Faeustlin via dovecot <dovecot@dovecot.org> wrote:

...

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.

The local-part MAY be case-sensitive, but in general I don't know any mail addresses where the case matters. Thus it is hard for me to understand, why this comparison of the vacation address is case-sensitive. Whether the final recipients address is also treated case-insensitive.

If this has to be case-sensitive to be RFC compliant, then please create an option for admins or users to change the behavior to an case-insensitive comparison.

Just change auth_username_format = %Lu to make all addresses lowercase. That should solve your problem. Or if you REALLY REALLY want to have case-sensitive userpart, then use auth_username_format = %n@%Ld

Sami

It seems there is a misunderstanding. In Pigeonhole Sieve version 0.5.7.2, the vacation module compares the additional :addresses case-sensitive. I want to have it case-insensitive again, like in Pigeonhole version 0.4.24

Philipp

Am 11.09.19 um 22:09 schrieb Stephan Bosch via dovecot:

On 02/09/2019 15:05, Philipp Faeustlin via dovecot wrote:

...

The recipients in the vacation :addresses String list are matched case-sensitive.

If the recipient gets a mail with wrong case, the message is discarded with: "discarding vacation response for implicitly delivered message; no known (envelope) recipient address found in message headers"

I think the matching should be case-insensitive.

Is this a bug or do I miss some option?

I'm using Dovecot 2.3.7.2, Pigeonhole version 0.5.7.2.

We're looking into this. Tracking internally as DOP-1424.

Regards,

Stephan. Hello Stephan,

are there some news about this topic? What happened to this BUG tracked by you internally as DOP-1424?

Regards,

Philipp