Re: [imapsync] unexplicable 'no header used or found for message...' warnings

[Gilles LAMIRAL <gilles dot lamiral at laposte dot net>]

Hello,

> with some "huge" Mailboxes (4'000-27'000 emails) I get very often following warning:
> 
> Warning: no header used or found for message NNN
> no header so taking body first 2Ko

Maybe a --nofirst2Ko is needed.

> The problem is that in most cases (99%) the header exists and if I open the email in a mail-client 
> (for instance mutt) I see it perfectly.

Ok.

> An unlucky consequence that in some cases I get up 
> to 10'000 time this warning and this means that 10'000 x 2Ko are downloaded, so that the biggest
> INBOX takes about 10 hours to be (re!!)-synced.

Ok.
If you use --usecache then the resync should avoid taking the headers again.
The cache is based on UID given from both sides, not on headers.

> Do you have experience with this kind of behavior?

No. I'll try a test on huge folder.

> I already tried with the --debugimap1 option but I didn't get any useful information.

On a big folder --debugimap will output too much.

> Is it somehow possible to printout the whole email? No only the bady (or a part of)?

Are those missing header messages well transfered?

> And... as you can imagine this problem it difficult to reproduce.

The issue is that if the header really exists then maybe the faulty
part is in getting the header. But getting the first 2Ko on one
side and the header on other side will bring imapsync to a resync
of the same message and generate a duplicate message.

The --usecache should prevent this.

> PS: -5 days

If you think the process needs more tests to be confident then ask a delay.
It's better to be late and good than on time and bad since bad implies
correcting, new delay, stress, frustrated users, boss and sysadmin.


-- 
Au revoir,                             09 51 84 42 42
Gilles Lamiral. France, Baulon (35580) 06 20 79 76 06