Description of problem:
procmail is unable to write to /home/user/Maildir folders as it does not have write access to the mail_home_rw_t context.

How reproducible:
Run mail through procmail and have it deliver to a Maildir folder in a user's home directory.

Steps to Reproduce:
1. Create .procmairc with MAILDIR=$HOME/Maildir
2. Send mail to user.
  
Actual results:
Mail is not delivered. procmail's log shows:
procmail: Error while writing to "/home/alanh/Maildir/tmp/1342487394.10921_0.starfall.dynip.com"
procmail: Couldn't create or rename temp file "/home/alanh/Maildir/tmp/1342487394.10921_0.starfall.dynip.com"

And the system log shows (among many others):
Jul 16 18:32:25 starfall kernel: [124408.763381] type=1400 audit(1342488745.221:48): avc:  denied  { write } for  pid=11084 comm="procmail" name="tmp" dev="dm-3" ino=262146 scontext=system_u:system_r:procmail_t:s0 tcontext=unconfined_u:object_r:mail_home_rw_t:s0 tclass=dir

Expected results:
Mail delivered to Maildir folder.

Additional info:
Running in permissive mode and then running audit2allow shows:

#============= procmail_t ==============
#!!!! The source type 'procmail_t' can write to a 'dir' of the following types:
# data_home_t, var_log_t, user_home_dir_t, mail_spool_t, tmp_t, user_home_t

allow procmail_t mail_home_rw_t:dir { write remove_name add_name };
#!!!! The source type 'procmail_t' can write to a 'file' of the following types:
# data_home_t, procmail_tmp_t, mail_spool_t, user_home_t

allow procmail_t mail_home_rw_t:file { write open create unlink link };

This may be related to bug 830611 which caused the same issue with dovecot.