[Dovecot] deliver + quota

Hi list,

can someone please explain me the following behaviour of deliver in combination with fs-quota and reading from stdin:

# repquota -a | grep ud_3p5 ud_3p5 -- 4464 10240 12288 10 0 0 # stat -c "%s" /tmp/mymail 4524853 so there's enough space for this mail

# su ud_3p5 -s/bin/sh -c "cat /tmp/mymail | /usr/libexec/dovecot/deliver -e; echo \$?" sda6: warning, user block quota exceeded. sda6: write failed, user block limit reached. Not enough disk space 77

vs.

# su ud_3p5 -s/bin/sh -c "/usr/libexec/dovecot/deliver -p /tmp/mymail -e; echo \$?" 0

Must have something to do with create_raw_stream inside deliver.c

System is running Dovecot v1.2.13

Thanks, / manuel