[Dovecot] Mail being delivered but MUA showing empty inbox

[Nigel Smith]

Dovecot :  2.0.19 (see config at http://pastebin.com/raw.php?i=KMaQ9Ccc)
Postfix :  2.9.6 (see config at http://pastebin.com/raw.php?i=EEeevHfk)

I'm trying to get Dovecot and Postfix working on Ubuntu 12.04LTS but am not having much luck.

The problem is that although mail gets delivered to the correct place, however pointing a MUA of any description at Dovecot just yields a purportedly empty inbox !

I will first demonstrate correct delivery of mail, then I will show MUA - domain names changed to protect the innocent !

(1) Mail Delivery

Aug  2 08:57:17 ukc-vm02-mx01 postfix/smtpd[2640]: connect from unknown[192.168.199.198]
Aug  2 08:57:39 ukc-vm02-mx01 postfix/smtpd[2640]: 76AB04470E: client=unknown[192.168.199.198]
Aug  2 08:57:47 ukc-vm02-mx01 postfix/cleanup[2644]: 76AB04470E: message-id=<>
Aug  2 08:57:47 ukc-vm02-mx01 postfix/qmgr[2093]: 76AB04470E: from=<an at example.com>, size=208, nrcpt=1 (queue active)
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192): Debug: none: root=, index=, control=, inbox=, alt=
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192): Connect from local
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192): Debug: auth input: test at ops.example.com uid=1001 gid=1001 home=/srv/mail/ops.example.com/test/./
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192, test at ops.example.com): Debug: Effective uid=1001, gid=1001, home=/srv/mail/ops.example.com/test
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192, test at ops.example.com): Debug: maildir++: root=/srv/mail/ops.example.com/test, index=, control=, inbox=/srv/mail/ops.example.com/test, alt=
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192, test at ops.example.com): ZH9VM3tm+1GQCAAAwf4bjw: msgid=unspecified: saved mail to INBOX
Aug  2 08:57:47 ukc-vm02-mx01 postfix/lmtp[2645]: 76AB04470E: to=<test at ops.example.com>, relay=ukc-vm02-mx01.ops.example.com[private/dovecot-lmtp], delay=24, delays=24/0.01/0/0.09, dsn=2.0.0, status=sent (250 2.0.0 <test at ops.example.com> ZH9VM3tm+1GQCAAAwf4bjw Saved)
Aug  2 08:57:47 ukc-vm02-mx01 dovecot: lmtp(2192): Disconnect from local: Client quit (in reset)
Aug  2 08:57:47 ukc-vm02-mx01 postfix/qmgr[2093]: 76AB04470E: removed
Aug  2 08:57:48 ukc-vm02-mx01 postfix/smtpd[2640]: disconnect from unknown[192.168.199.198]

The mail is correctly saved in the right place…..

# cat /srv/mail/ops.ops.example.com/test/new/1375430267.M868397P2192.ukc-vm02-mx01\,S\=477\,W\=486 
Return-Path: <an at example.com>
Delivered-To: <test at ops.ops.example.com>
Received: from ukc-vm02-mx01.ops.ops.example.com
        by ukc-vm02-mx01.ops.ops.example.com (Dovecot) with LMTP id ZH9VM3tm+1GQCAAAwf4bjw
        for <test at ops.ops.example.com>; Fri, 02 Aug 2013 08:57:47 +0100
Received: from x (unknown [192.168.199.198])
        by ukc-vm02-mx01.ops.ops.example.com (Postfix) with ESMTP id 76AB04470E
        for <test at ops.ops.example.com>; Fri,  2 Aug 2013 08:57:24 +0100 (BST)
Subject: test


(2) MUA


* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN] Dovecot ready.
a1 LOGIN test at ops.example.com test
a1 OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in
a2 EXAMINE INBOX
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS ()] Read-only mailbox.
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1375424854] UIDs valid
* OK [UIDNEXT 1] Predicted next UID
* OK [HIGHESTMODSEQ 1] Highest
a2 OK [READ-ONLY] Select completed.
a3 LOGOUT
* BYE Logging out
a3 OK Logout completed.
closed