[postfix] pipe alias permission denied

[Carsten]

root at derdapp004 ~www/horde/whups/lib # uname -a
Linux derdapp004 3.4.113-bananian #9 SMP PREEMPT Sat May 6 12:20:11 UTC 
2017 armv7l GNU/Linux

root at derdapp004 ~www/horde/whups/lib # ps -ef|grep postfix
root      2124     1  0 Mar11 ?        00:00:02 /usr/lib/postfix/master
postfix  16757  2124  0 13:33 ?        00:00:00 qmgr -l -t unix -u
postfix  16765  2124  0 13:34 ?        00:00:00 tlsmgr -l -t unix -u -c
postfix  17738  2124  0 13:46 ?        00:00:00 anvil -l -t unix -u -c
postfix  24447  2124  0 15:13 ?        00:00:00 pickup -l -t unix -u -c
postfix  24906  2124  0 15:17 ?        00:00:00 smtpd -n smtp -t inet -u 
-c -o stress= -s 2
postfix  25657  2124  0 15:28 ?        00:00:00 smtpd -n smtp -t inet -u 
-c -o stress= -s 2

Update aus einem weiteren Test (C&P von der Horde mailing List):
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I reworked the permissions on the tree as follows:
/ : drwxr-xr-x  16 root  root /var
/var : drwxr-xr-x  4 root  root  4096 May  6  2017 www
/var/www : drwxr-xr-x 24 www-data www-horde 4096 Mar  7 11:33 horde
/var/www/horde : drwxr-xr-x 13 www-data www-horde  4096 Mar  7 11:33 whups
/var/www/horde/whups : drwxr-xr-x 14 www-data www-horde 4096 Mar 7 11:33 
lib
/var/www/horde/whups/lib : -rwxr-x--- 1 postfix-pipe www-horde 9232 Mar 
11 18:55 Application.php

Pointing out the changes: set 755 from "var" down to "lib" and changed 
owner of "Application.php" to "postfix-pipe".

=>> This version works.

If I set the owner of "Application.php" back to "www-data" it fails again.
Just to make sure, the group member ship is correct:
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root at derdapp004 ~www/horde/whups/lib # groups postfix-pipe
postfix-pipe : postfix-pipe www-horde
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It seems to ignore the group member ship, if triggered by postfix aliases.

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Am 12.03.2018 um 15:17 schrieb Marco Dickert:
> Welches Betriebssystem setzt du ein? Unter debian-basierten Systemen läuft der
> Postfix meist chrooted, vielleicht könnte das das Problem sein.
>