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Description of problem:
Dovecot can't fetch any mail (even those stored in /var/spool/mail) if
user the parent of the user's home directory hasn't execute permition
for group root (x - bit).

Version-Release number of selected component (if applicable):
dovecot-0.99.13-3.FC3

How reproducible:
Always

Steps to Reproduce:
1. chgrp users /home
2. chmod go-rwx /home
3.
    

Actual Results:  It is imposible to fetch any mail.

Additional info:

This problem is now fixed but in the test version of dovecot (e.g.
dovecot-1.0-test60 - see www.dovecot.org). It can be fixed by doing
not only setreuid(gid, gid) (in file mail-process.c) but first first
setregid(gid, gid) have to be done. Now after setreuid(gid, gid) is
executed user still belongs to the group root.