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...y the mail isn't saved corrupted. The bug is when reading the > mail. So any existing corrupted mails become fixed after upgrading. > > Fix here: > https://github.com/dovecot/core/commit/5068b11e594ad7cc1f7cedf2bd9280520e0e534d > Could this also apply to this Timo? We also using attachment_dir with plugin zlib https://dovecot.org/list/dovecot/2019-September/117007.html

...ovecot, that lead to several broken mails on our servers. The bug corrupts the first few characters of the mail header during saving. On our setup, it was almost always only the very first line of text, that was corrupted. > > The bug seems to be triggered by a bad "interaction" of attachment_dir option and zlib plugin. If you use both, you most likely are affected, too, except you only use zlib plugin for reading previously compressed stored mails. That's also the workaround we use now: zlib plugin only enabled in mail_plugins but no plugin/zlib_save set. Actually the mail isn't s...

.../m.813))): FETCH BODY[HEADER.FIELDS (RETURN-PATH SUBJECT)] got too little data: 2 vs 122 In our case that finally grabbed my attention, the client was the users iphone that did not display any new messages but his Thunderbird did. The bug seems to be triggered by a bad "interaction" of attachment_dir option and zlib plugin. If you use both, you most likely are affected, too, except you only use zlib plugin for reading previously compressed stored mails. That's also the workaround we use now: zlib plugin only enabled in mail_plugins but no plugin/zlib_save set. The bug occurs on very sp...

...orrupted mail per mailbox. > > I cannot figure out a feasible workaround for our system, and I can see that in new version 2.38 the bug is not fixed. > > Will this issue be treated soon? > > Thanks a lot > > Maren Zubizarreta > > > WARNING: using attachment_dir with plugin zlib can corrupt mails > > Patrick Cernko pcernko at mpi-klsb.mpg.de <mailto:dovecot%40dovecot.org?Subject=Re:%20Re%3A%20WARNING%3A%20using%20attachment_dir%20with%20plugin%20zlib%20can%20corrupt%20mails&In-Reply-To=%3C1ab8edcc-bef4-3b41-d09a-c523674a5031%40mpi-klsb.mpg.de...

...cannot see any message, even if there is only one corrupted mail per mailbox. I cannot figure out a feasible workaround for our system, and I can see that in new version 2.38 the bug is not fixed. Will this issue be treated soon? Thanks a lot Maren Zubizarreta WARNING: using attachment_dir with plugin zlib can corrupt mails Patrick Cernko pcernko at mpi-klsb.mpg.de<mailto:dovecot%40dovecot.org?Subject=Re:%20Re%3A%20WARNING%3A%20using%20attachment_dir%20with%20plugin%20zlib%20can%20corrupt%20mails&In-Reply-To=%3C1ab8edcc-bef4-3b41-d09a-c523674a5031%40mpi-klsb.mpg.de%3E> Fri...

Hi, I've been testing SIS over the weekend as it seems to be a nifty feature. I don't have that many users and mailboxes but still... I only added the following line to my configuration: mail_attachment_dir = /var/spool/vmail/attachments As a test I sent a mail from GMail to 2 mailboxes (1 To and 1 CC). The attachment got saved to the attachment directory (on ZFS): # find . ./04 ./04/78 ./04/78/0478b28c2a4c235370bb3cef4bc0482bb6000dae-b8819638a60e574d5b530100bde47b1f-2088e7301f9e3c4dc97e0000bde47b1...