Hello,
I'm bumping this because it still occurs with dovecot 2.2.22.
my dovecot-antispam plugin configuration :
antispam_allow_append_to_spam = no antispam_backend = pipe antispam_pipe_program = /usr/bin/rspamc antispam_pipe_program_args = -h;127.0.0.1:11334;-P;******** antispam_pipe_program_notspam_arg = learn_ham antispam_pipe_program_spam_arg = learn_spam antispam_pipe_tmpdir = /var/tmp antispam_spam = Junk antispam_trash = trash;Trash;Deleted Items;Deleted Messages
zlib enabled: zlib_save = gz zlib_save_level = 9
When moving 2 or more messages from inbox to the Junk folder:
"J47 NO [CANNOT] Failed to copy to temporary file (0.000 + 0.000 secs).”. Command attempted: “J47 UID MOVE 106318:106319 Junk"
or sometimes
"J123 NO [CANNOT] Failed to read mail beginning (0.000 + 0.000 secs).”. Command attempted: “J123 UID MOVE 170789:170790 Junk"
and still have the "Cached message size smaller..." in dovecot logs.
It occurs at least when header lines of an email contains Non-ASCII Text (rfc1342). Batches of full ascii emails are not affected.
I can easily reproduce this from/to the Junk folder, but had unconfirmed reports of similar errors when batch moving mails across regular folders.
Stéphane
On 8 Nov 2015, at 11:50, Stéphane Cottin wrote:
Hi,
I've got some trouble with the dovecot antispam plugin and the pipe backend.
I'm using dovecot 2.2.18 with maildirs and zlib compression enabled.
When moving 2 or more emails at once from the Junk folder to another one, I always have the following error : "Failed to copy to temporary file"
In the server logs :
imap(vvv@vvv.vvv): Error: read(zlib(/data/Maildir/.test/tmp/1446974366.M123890P936.vvv)) failed: Cached message size smaller than expected (13553 < 13562, box=test, UID=0)
The same operation with one email at a time, on the same emails, works as expected.
Stéphane