[Dovecot] OT: best linux imap client for dovecot

[WJCarpenter]

>> Example:
>> * I have 100's of sent-mail mailboxes I don't want to be subscribed 
>> to, because it is doubtful I will ever use them. These mailboxes are 
>> unsubscribed because I don't want to see them in any mailbox listings 
>> by default.
>
> This use of subscriptions is a terrible abuse of IMAP. Like most 
> terrible abuses, it's a-ok to choose for yourself if you're an 
> advanced user, but anyone who has done support for a broad user base 
> knows that a client should *NEVER* act like this as the default. 
> Subscriptions are brittle and non-portable and hiding mailboxes based 
> on them leads only to floods of "Where is all my mail you screwed up 
> my life!!!!" interactions.

I'm genuinely confused by this come-back.  Could you elaborate?

Why is having subscriptions (and, specifically, some folders to which 
you are not subscribed) a terrible abuse of IMAP?  What is non-portable 
about subscriptions?  The IMAP protocol supports them directly.