St?phane Cottin writes:
A typical .qmail file :
| /usr/bin/dspam --client --deliver=stdout --user "$EXT@$USER" | /usr/bin/preline -f
/usr/lib/dovecot/dovecot-lda -d "$EXT@$USER" -a "$EXT@$USER" -m "$EXT2"
When dspam segfault or is killed, preline receive an empty content and
only pass to dovecot-lda two headers ( Return-Path and Delivered-To ).
Then dovecot-lda delivers successfully and the original message
contents are lost.
Steffen Kaiser rightly points out:
That's the problem of the used Unix pipe and broken by design. The right
member of the pipe (preline) runs independendly of dspam and recieves no
content via pipe. Why should preline or dovecot-lda believe there is an
error? [... and suggests a wrapper script that aborts delivery on empty
dspam output.]
I'm not sure if it's appropriate under your circumstances, but you can also
pass stderr to stdout as well, and the recipient will get some diagnostic
message, which may or may not be helpful.
| /usr/bin/dspam --client --deliver=stdout --user "$EXT@$USER" 2>&1 |
...
Joseph Tam <[email protected]>
