Hello, wondering why it's still an issue with current git, while this old working solution exists (tested with dovecot 2.22 and rspamd 1.4) :

https://www.dovecot.org/list/dovecot/2013-November/093810.html

Best regards, Sergey Urushkin

Stéphane Cottin писал 2016-04-18 15:44:

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