You need to check and set both the ownership (chown) and the perms (chmod) on the folders and files for each user (starting in the /home/e-smith/files/users folder). Below is and example from my server:
total 188
drwx------ 8 mark mark 4096 Mar 6 02:05 .
drwxr-xr-x 9 root root 4096 Feb 20 2004 ..
drwxr-xr-x 2 mark mark 4096 Jan 19 00:14 home
drwx------ 2 mark mark 4096 Feb 15 2004 Mail
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 Maildir
-rw------- 1 mark mark 47499 Mar 5 23:20 procmail.log
-rw------- 1 mark mark 59069 Feb 27 04:06 procmail.log.1
-rw------- 1 mark mark 36022 Feb 20 04:06 procmail.log.2
-rw-r--r-- 1 mark mark 1848 Aug 16 2004 .procmailrc
drwxrwxrwx 2 root root 4096 Feb 20 2004 .pyzor
-rw-r--r-- 1 mark mark 474 Feb 20 2004 .qmail
lrwxrwxrwx 1 root admin 6 Feb 15 2004 .qmail-default -> .qmail
drwxr-xr-x 2 mark mark 4096 Aug 16 2004 .razor
drwx------ 2 mark mark 4096 Aug 16 2004 .spamassassin
-rw-r--r-- 1 root root 0 Mar 6 02:05 work
./home:
total 8
drwxr-xr-x 2 mark mark 4096 Jan 19 00:14 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
lrwxrwxrwx 1 root root 39 Jan 19 00:14 files -> /home/e-smith/files/ibays/Primary/files
./Mail:
total 8
drwx------ 2 mark mark 4096 Feb 15 2004 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
./Maildir:
total 52
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
drwxr-xr-x 2 mark mark 8192 Mar 2 09:15 cur
-rw-r----- 1 mark mark 5 Feb 21 2004 .customflags
-rw-r--r-- 1 mark mark 91 Mar 2 09:15 dovecot-uidlist
drwxr-x--- 2 mark mark 4096 Feb 26 2004 ;INBOX
drwxr-xr-x 5 mark mark 4096 Mar 2 09:15 ;junkmail
drwxr-x--- 5 mark mark 4096 Mar 17 2004 ;Keep
drwxr-xr-x 2 mark mark 8192 Mar 6 00:35 new
drwxr-x--- 5 mark mark 4096 Mar 1 18:52 ;sent-mail
drwxr-xr-x 2 mark mark 4096 Mar 5 23:20 tmp
./Maildir/cur:
total 12
drwxr-xr-x 2 mark mark 8192 Mar 2 09:15 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
./Maildir/;INBOX:
total 32
drwxr-x--- 2 mark mark 4096 Feb 26 2004 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
-rw-r----- 1 mark mark 1608 Mar 2 09:15 .imap.index
-rw-r----- 1 mark mark 10264 Feb 26 2004 .imap.index.data
-rw-r----- 1 mark mark 2576 Feb 21 2004 .imap.index.log
-rw-r----- 1 mark mark 1556 Feb 26 2004 .imap.index.tree
./Maildir/;junkmail:
total 52
drwxr-xr-x 5 mark mark 4096 Mar 2 09:15 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
drwxr-xr-x 2 mark mark 4096 Mar 2 09:15 cur
-rw-r----- 1 mark mark 5 Feb 26 2004 .customflags
-rw-r--r-- 1 mark mark 161 Mar 2 09:15 dovecot-uidlist
-rw-r----- 1 mark mark 1608 Mar 2 09:15 .imap.index
-rw-r----- 1 mark mark 10264 Apr 28 2004 .imap.index.data
-rw-r----- 1 mark mark 2576 Feb 26 2004 .imap.index.log
-rw-r----- 1 mark mark 1556 Feb 26 2004 .imap.index.tree
drwxr-xr-x 2 mark mark 4096 Mar 2 09:15 new
drwxr-xr-x 2 mark mark 4096 Mar 1 10:29 tmp
./Maildir/;junkmail/cur:
total 108
drwxr-xr-x 2 mark mark 4096 Mar 2 09:15 .
drwxr-xr-x 5 mark mark 4096 Mar 2 09:15 ..
-rw------- 1 mark mark 42599 Feb 23 06:33 1109111591.31445_0.kryten:2,T
-rw------- 1 mark mark 4484 Feb 25 23:21 1109344904.20111_0.kryten:2,T
-rw------- 1 mark mark 4499 Feb 25 23:52 1109346757.20955_0.kryten
-rw------- 1 mark mark 4038 Feb 26 16:20 1109406054.11545_0.kryten
-rw------- 1 mark mark 34300 Mar 1 10:29 1109644140.17005_0.kryten
./Maildir/;junkmail/new:
total 8
drwxr-xr-x 2 mark mark 4096 Mar 2 09:15 .
drwxr-xr-x 5 mark mark 4096 Mar 2 09:15 ..
./Maildir/;junkmail/tmp:
total 8
drwxr-xr-x 2 mark mark 4096 Mar 1 10:29 .
drwxr-xr-x 5 mark mark 4096 Mar 2 09:15 ..
./Maildir/;Keep:
total 48
drwxr-x--- 5 mark mark 4096 Mar 17 2004 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
drwxr-x--- 2 mark mark 4096 Mar 17 2004 cur
-rw-r----- 1 mark mark 5 Mar 17 2004 .customflags
-rw-r----- 1 mark mark 1608 Mar 17 2004 .imap.index
-rw-r----- 1 mark mark 10264 Mar 17 2004 .imap.index.data
-rw-r----- 1 mark mark 2576 Mar 17 2004 .imap.index.log
-rw-r----- 1 mark mark 1556 Mar 17 2004 .imap.index.tree
drwxr-x--- 2 mark mark 4096 Mar 17 2004 new
drwxr-x--- 2 mark mark 4096 Mar 17 2004 tmp
./Maildir/;Keep/cur:
total 8
drwxr-x--- 2 mark mark 4096 Mar 17 2004 .
drwxr-x--- 5 mark mark 4096 Mar 17 2004 ..
./Maildir/;Keep/new:
total 8
drwxr-x--- 2 mark mark 4096 Mar 17 2004 .
drwxr-x--- 5 mark mark 4096 Mar 17 2004 ..
./Maildir/;Keep/tmp:
total 8
drwxr-x--- 2 mark mark 4096 Mar 17 2004 .
drwxr-x--- 5 mark mark 4096 Mar 17 2004 ..
./Maildir/new:
total 12
drwxr-xr-x 2 mark mark 8192 Mar 6 00:35 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
./Maildir/;sent-mail:
total 52
drwxr-x--- 5 mark mark 4096 Mar 1 18:52 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
drwxr-x--- 2 mark mark 4096 Mar 1 18:52 cur
-rw-r----- 1 mark mark 5 Feb 21 2004 .customflags
-rw-r--r-- 1 mark mark 306 Mar 1 18:52 dovecot-uidlist
-rw-r----- 1 mark mark 1608 Mar 1 18:52 .imap.index
-rw-r----- 1 mark mark 10264 Jul 9 2004 .imap.index.data
-rw-r----- 1 mark mark 2576 Feb 21 2004 .imap.index.log
-rw-r----- 1 mark mark 1556 Feb 21 2004 .imap.index.tree
drwxr-x--- 2 mark mark 4096 Mar 1 18:52 new
drwxr-x--- 2 mark mark 4096 Mar 1 18:51 tmp
./Maildir/;sent-mail/cur:
total 600
drwxr-x--- 2 mark mark 4096 Mar 1 18:52 .
drwxr-x--- 5 mark mark 4096 Mar 1 18:52 ..
-rw------- 1 mark mark 576 Nov 19 18:55 1100861745.P9322Q0M974464.kryten:2,S
-rw------- 1 mark mark 856 Nov 19 18:58 1100861917.P9413Q0M216647.kryten:2,S
-rw------- 1 mark mark 523 Dec 17 17:11 1103274686.P4566Q0M193886.kryten:2,S
-rw------- 1 mark mark 496 Dec 17 17:27 1103275646.P4917Q0M787036.kryten:2,S
-rw------- 1 mark mark 286090 Dec 17 17:33 1103276029.P5061Q0M759915.kryten:2,S
-rw------- 1 mark mark 286091 Dec 17 17:44 1103276659.P5301Q0M675621.kryten:2,S
-rw------- 1 mark mark 549 Feb 9 19:15 1107947725.P31191Q0M663909.kryten:2,S
-rw------- 1 mark mark 556 Mar 1 18:51 1109674291.P27425Q0M553147.kryten:2,S
./Maildir/;sent-mail/new:
total 8
drwxr-x--- 2 mark mark 4096 Mar 1 18:52 .
drwxr-x--- 5 mark mark 4096 Mar 1 18:52 ..
./Maildir/;sent-mail/tmp:
total 8
drwxr-x--- 2 mark mark 4096 Mar 1 18:51 .
drwxr-x--- 5 mark mark 4096 Mar 1 18:52 ..
./Maildir/tmp:
total 8
drwxr-xr-x 2 mark mark 4096 Mar 5 23:20 .
drwxr-xr-x 9 mark mark 4096 Mar 2 09:15 ..
./.pyzor:
total 12
drwxrwxrwx 2 root root 4096 Feb 20 2004 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
-rw-rw-rw- 1 root root 19 Feb 20 2004 servers
./.razor:
total 1092
drwxr-xr-x 2 mark mark 4096 Aug 16 2004 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
-rw-rw-rw- 1 mark mark 1068738 Aug 16 2004 razor-agent.log
-rw-rw-rw- 1 mark mark 480 Feb 27 2004 server.malice.cloudmark.com.conf
-rw-rw-rw- 1 mark mark 537 Jul 12 2004 server.pride.cloudmark.com.conf
-rw-rw-rw- 1 mark mark 62 Aug 16 2004 servers.catalogue.lst
-rw-rw-rw- 1 mark mark 112 Jun 25 2004 servers.discovery.lst
-rw-rw-rw- 1 mark mark 480 Apr 1 2004 server.shock.cloudmark.com.conf
-rw-rw-rw- 1 mark mark 38 Aug 16 2004 servers.nomination.lst
-rw-rw-rw- 1 mark mark 536 Aug 16 2004 server.thrill.cloudmark.com.conf
-rw-rw-rw- 1 mark mark 480 Mar 31 2004 server.truth.cloudmark.com.conf
-rw-rw-rw- 1 mark mark 536 Aug 16 2004 server.wonder.cloudmark.com.conf
./.spamassassin:
total 276
drwx------ 2 mark mark 4096 Aug 16 2004 .
drwx------ 8 mark mark 4096 Mar 6 02:05 ..
-rw------- 1 mark mark 172032 Aug 16 2004 auto-whitelist.db
-rw------- 1 mark mark 12288 Jul 19 2004 bayes_seen
-rw------- 1 mark mark 94208 Jul 19 2004 bayes_toks
-rw-rw-rw- 1 mark mark 1165 Feb 20 2004 user_prefs