Bug: subscriptions file

[Aki Tuomi]

I understand that reading that paragraph makes it sounds obscure and
outdated. But the problem is that if something deletes & recreates your
folder, while you were gone, you would lose the subscription. This
includes other MUAs that are in no way obligated to resubscribe to the
folder if they do this.

Aki


On 23.05.2018 23:13, Rupert Gallagher wrote:
> Sorry for top posting, my client is still broken. 
>
> I have never seen the ghost of a "system-alerts" or similar
> "well-known" mail folder in the past 30 years. 
>
> Compliance with an RFC obscure feature is compellong us all to clear
> subscriptions fol ders by hand. 
>
> As we meet the problem over and over again, a non-RFC configuration
> option could solve the problem, and it would be very much appreciated...
>
>
> On Wed, May 23, 2018 at 11:57, Aki Tuomi <aki.tuomi at dovecot.fi
> <mailto:aki.tuomi at dovecot.fi>> wrote:
>
> > On 23.05.2018 12:31, Rupert Gallagher wrote:
>>> Dovecot does not clear the subscription file from non-existent
>>> folders. 
>>
>> Hi!
>>
>> Thank you for your bug report. Unfortunately this is not a BUG, but
>> mandated behavior by RFC3501, see last two paragraphs in the excerpt.
>>
>> Aki Tuomi
>>
>> 6.3.6.  SUBSCRIBE Command
>>
>>    Arguments:  mailbox
>>
>>    Responses:  no specific responses for this command
>>
>>    Result:     OK - subscribe completed
>>                NO - subscribe failure: can't subscribe to that name
>>                BAD - command unknown or arguments invalid
>>
>>       The SUBSCRIBE command adds the specified mailbox name to the
>>       server's set of "active" or "subscribed" mailboxes as returned by
>>       the LSUB command.  This command returns a tagged OK response only
>>       if the subscription is successful.
>>
>>       A server MAY validate the mailbox argument to SUBSCRIBE to verify
>>       that it exists.  However, it MUST NOT unilaterally remove an
>>       existing mailbox name from the subscription list even if a mailbox
>>       by that name no longer exists.
>>
>>            Note: This requirement is because a server site can
>>            choose to routinely remove a mailbox with a well-known
>>            name (e.g., "system-alerts") after its contents expire,
>>            with the intention of recreating it when new contents
>>            are appropriate.

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