[MAILBOX-392] Strengthen Mailbox name validation upon mailbox creation

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.5.0
• Component/s: api
• Assignee: Unassigned
• Reporter: Benoit Tellier
• Created: 13/Nov/19 04:10
• Updated: 28/Dec/20 07:47
• Resolved: 15/Nov/19 02:46

Description

https://tools.ietf.org/html/rfc3501#section-5.1 states that:

   3)    Although the list-wildcard characters ("%" and "*") are valid
         in a mailbox name, it is difficult to use such mailbox names
         with the LIST and LSUB commands due to the conflict with
         wildcard interpretation.


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

However there requirements are not enforced by the mailbox backend.

With JMAP we can create a mailbox containing forbidden characters leading to invalid mailbox namesfor instace containing `#`