[Dovecot] zlib plugin doesn't read concatenated .gz mailbox

[Dmitry Nezhevenko]

Hi,

I've observed that dovecot doesn't displays all mails from compressed via
gzip mailbox (mbox). At the same time "mutt -f mailbox.gz" displays it
correctly with all messages.

I'm using archivemail to archive old mails. Internally it creates new
"gzip" archive with "expired" messages and then concatenates it with
archive.

The easiest way to reproduce it without archivemail is to create two
mailboxes, gzip them independently and then concatenate to one gzip
archive. mutt, gunzip and other tools understands such archives.

Also I've shared such mbox:
http://dion.org.ua/uploads/2011/07/dovecot_test_gzip.gz

It should contains ~20 messages. dovecot will "see" only two first.

PS. 
% sudo dovecot --version
2.0.13

-- 
WBR, Dmitry
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