By the way https://www.rfc-editor.org/rfc/rfc3501#section-5.1

   5)    Two characters, "#" and "&", have meanings by convention, and
         should be avoided except when used in that convention.--


Best regards,



Benoit TELLIER



General manager of Linagora VIETNAM.

Product owner for Team-Mail product.

Chairman of the Apache James project.



Mail: btell...@linagora.com

Tel: (0033) 6 77 26 04 58 (WhatsApp, Signal)

On Jun 22, 2023 12:32 PM, from Benoit Tellier Hello Wojtek,

That is because James employs a folder hierarchy where '#' is used to denote a 
namespace.

#private:wojtek:INBOX denotes your inbox on which I would have a shared access.
#shared:marketting:INBOX denotes a shared mailbox for the marketting team.

I bet you could do: #private:wojtek:#hashtest ?

That being said, james have no support for accessing shared mailboxes in IMAP 
just quite yet. The usefulness of that addressing scheme is thus limited.

IMO we could:
 - Drop the #namespace:user:mailbox addressing sheme in IMAP as it is not 
currently in use...
 - Or (lighter) if we can't parse a mailbox path (no : after #) then keep the 
name as is, IE support #hashtest
 - Review and adopt another addressing sheme that matches those of eg cyrus.

--


Best regards,



Benoit TELLIER



General manager of Linagora VIETNAM.

Product owner for Team-Mail product.

Chairman of the Apache James project.



Mail: btell...@linagora.com

Tel: (0033) 6 77 26 04 58 (WhatsApp, Signal)

On Jun 22, 2023 9:10 AM, from Wojtek Hi,
I ran into an issue when importing mails from other servers - it seems that 
it's not possible to
create folder which name starts with hash-sign, e.g.: "#testfolder".

I tested other mail servers (gmail, mailu [postfix?], fastmail [cyrrus?], 
mailbox.org, infomaniak
[no idea what they use]) and all of them allowed folder names starting with "#".


```
A4 CREATE #hashtest
A4 NO CREATE You can not access a mailbox that does not belong to you
```

Looking at the spec (https://datatracker.ietf.org/doc/html/rfc3501#section-5.1) 
it seems that `#`
can have special meaning and could be used to denote namespaces.

Is it a configurable option (i.e. is it possible to disable namespaces/shared 
mailboxes or some
such) that would result in James allowing mailboxes starting with `#`?

--
Wojtek

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