[Dovecot] mail-filter always results in corrupted indexes

[martijn.list]

Hi,

I'm experimenting with the mail-filter plugin but whenever I add
anything to a message, it always results in an corrupted cache:

from the logs:

Dec 14 16:09:55 ciphermail-webmail dovecot:
imap(martijn=djigzo.com at ciphermail.private): Error: Corrupted index
cache file
/var/vmail/martijn=djigzo.com at ciphermail.private/dovecot.index.cache:
Broken physical size for mail UID 76
Dec 14 16:09:55 ciphermail-webmail dovecot:
imap(martijn=djigzo.com at ciphermail.private): Error: read() failed:
Invalid argument
Dec 14 16:10:02 ciphermail-webmail dovecot:
imap(martijn=djigzo.com at ciphermail.private): Error: Cached message size
smaller than expected (773 < 777)
Dec 14 16:10:02 ciphermail-webmail dovecot:
imap(martijn=djigzo.com at ciphermail.private): Error: Maildir filename has
wrong S value, renamed the file from
/var/vmail/martijn=djigzo.com at ciphermail.private/cur/1387033802.M114583P9631.ciphermail-webmail,S=773,W=791:2,
t

A do-nothing filter that just sends the input to the output works but
whenever I add something trivial to the message, the cache is always
corrupted.

I using Dovecot 2.2.9.1 (from the deb archives).

I use the following trivial test to add some XXX chars and and later
remove them.

In mail-filter.sh I append some chars and in mail-filter-out I filter
these chars out (this is just a test)

cat > /tmp/dovecot-in.txt

echo "XXX" >> /tmp/dovecot-in.txt

cat /tmp/dovecot-in.txt

mail-filter-out:

cat > /tmp/dovecot-out.txt

sed -i /XXX/d /tmp/dovecot-out.txt

cat /tmp/dovecot-out.txt


Any idea what I'm doing wrong?

Kind regards,

Martijn Brinkers