More special chars in mailbox names

[Wesley Craig]

On 30 Sep 2008, at 16:33, Ken Murchison wrote:
> While looking over bug #3002, https://bugzilla.andrew.cmu.edu/ 
> show_bug.cgi?id=3002
>
> I started wondering what other special characters we might want to  
> allow.  The original authors were more restrictive with GOODCHARS  
> than the RFC.  AFAICT the following characters are permitted by RFC  
> 3501 but aren't included in GOODCHARS
>
> ! # $ & ' ; < > ? [ ^ ` } |
>
>
> ! and ^ have special meaning to Cyrus, so we may not want to add  
> these to GOODCHARS.  & and ? might conflict with modified UTF-7  
> encoding.
>
> Looking back at the list archives, there have been several requests  
> to allow ' (single quote) and I'm included to do so.
>
> Does anybody want to make a case for adding more?
>
> Has anybody already added some of these in production without any  
> adverse effects?

UMich has added this list:

	#$%'()*;<>?[]^`{|}

for years without any reported issues.  These were added primarily to  
deal with transition from UWIMAP to Cyrus, I'm not making a case for  
any of them, personally.

:wes