[Dovecot] X-UID: 4085788205 != 2147483647

[Timo Sirainen]

On Tue, 2007-01-23 at 17:07 +1100, Stephen Gowing wrote:
> Hi,
> 
> Dovecot (at least versions 0.99.10.4, 0.99.11, 1.0rc15, rc17 and rc18)
> allows message Unique Identifiers to be an unsigned 32 bit value, so
> something like "X-UID: 4085788205" is allowed.
> 
> Some IMAP clients I've tested (Thunderbird 1.5.0.9, SquirrelMail
> 1.4.9a/PHP 4.3.2) appear to use signed 32 bit identifiers and request
> the above message as UID 2147483647 (max signed 32 bit integer).
> Evolution 2.0.2 fetches 4085788205 without complaint.
> 
> Is there any chance Dovecot could decide to invalidate and renumber a
> folder when identifiers greater than 2147483647 are found?

Dovecot used to do that in the early versions, but now it requires
changing a couple of different things so it's not done. Also I'm not
sure if it's such a good idea to do it automatically, because it might
lose some important information. Some clients map their own metadata
with the UID number.

I don't think it's a real problem anyway? 0.99.x versions could have
allowed the UIDs to grow just by sending it a mail with a large X-UID
value, but that's not possible anymore.
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