cascading (?) errors

[brian]

Cyrus-IMAP 2.2.13-14ubuntu3.1
Postfix 2.5.5-1.1
Spamassassin 3.2.5-4ubuntu0.0.1

I'm not certain this is a Cyrus issue, but Cyrus is the thing that i've 
changed recently.

I've suddenly got a bunch of the following errors in my log:

Nov  7 13:48:56 artemis postfix/pipe[31890]: 5A9A57A0EE6: 
to=<admin at REMOVED>, relay=procmail, delay=3.2, delays=3/0.01/0
/0.22, dsn=4.3.0, status=deferred (temporary failure. Command output: 
procmail: Error while writing to "/var/log/procmai
l.log" procmail: [31891] Mon Nov  7 13:48:55 2011 procmail: No match on 
"^X-Spam-Flag: YES" procmail: Executing "/usr/sb
in/cyrdeliver,-a,admin at REMOVED,-m,user.admin at REMOVED" procmail: Error 
while writing to "/usr/sbin/cyrdeliver" procmail:
Assigning "LASTFOLDER=/usr/sbin/cyrdeliver -a admin at REMOVED -m 
user.admin at REMOVED"  Subject: Re: REMOVED   Folder: **Requeued** 
8802057 )

I searched online and found that the problem was (maybe) a permissions 
issue. Figuring that I'd temporarily resolve it until learning more, I 
tried:

sudo chmod ugo+w /var/log/procmail.log

... and re-started Postfix. Now i'm seeing:

postfix/pipe[32052]: 8A0BF7A0EE9: to=<admin at REMOVED>, relay=procmail, 
delay=1, delays=0.99/0/0/0, dsn=2.0.0, status=sent (delivered via 
procmail service)
postfix/qmgr[31998]: 8A0BF7A0EE9: removed
cyrus/master[32055]: about to exec /usr/lib/cyrus/bin/lmtpd
cyrus/lmtpunix[32055]: executed
cyrus/lmtpunix[32055]: accepted connection
cyrus/lmtpunix[32055]: lmtp connection preauth'd as postman
cyrus/lmtpunix[32055]: verify_user(REMOVED!user^admin) failed: Mailbox 
does not exist

and:

postfix/pipe[32199]: B05177A1189: to=<admin at REMOVED>, relay=procmail, 
delay=1.1, delays=1/0/0/0.01, dsn=2.0.0, status=sent (delivered via 
procmail service)
postfix/qmgr[31998]: B05177A1189: removed
cyrus/lmtpunix[32192]: verify_user(REMOVED!user^admin) failed: Mailbox 
does not exist
cyrus/lmtpunix[32202]: accepted connection
cyrus/lmtpunix[32202]: lmtp connection preauth'd as postman
cyrus/lmtpunix[32202]: verify_user(REMOVED!user^admin) failed: Mailbox 
does not exist
postfix/pipe[32190]: 5A9A57A0EE6: to=<admin at REMOVED>, relay=procmail, 
delay=956, delays=950/0.5/0/5.3, dsn=4.3.0, status=deferred (temporary 
failure)


The msg saying the mailbox doesn't exist is very worrying. As it 
happens, the procmail errors started showing up around the same time I 
created several new mailboxes. (For a different domain--the mailbox 
above has existed for years.) I logged in to cyradmin and listed the 
mailboxes. It seems fine:

user/admin at REMOVED (\HasChildren)
(shows also all the child fiolders)

The one configuration setting that I changed at the time I created these 
new mailboxes was to change unixhierarchysep from "no" to "yes" as the 
new accounts have the dot.separated@ format. Could this be why the old 
mailboxes can't be found? Please don't tell me that I can use only one 
or the other format.

Next, i came across the following:

spamc[32164]: connect to spamd on 127.0.0.1 failed, retrying (#1 of 3): 
Connection refused
spamc[32164]: connect to spamd on 127.0.0.1 failed, retrying (#2 of 3): 
Connection refused
spamc[32164]: connect to spamd on 127.0.0.1 failed, retrying (#3 of 3): 
Connection refused
spamc[32164]: connection attempt to spamd aborted after 3 retries


And then, while I was tailing mail.log, it appeared that one of the 
mailbox owners was trying to log in:

cyrus/imaps[32403]: imaps TLS negotiation failed: 
modemcable228.38-48-24.mc.videotron.ca [24.48.38.228]
cyrus/imaps[32403]: Fatal error: tls_start_servertls() failed
cyrus/master[17882]: process 32403 exited, status 75
cyrus/master[17882]: service imaps pid 32403 in BUSY state: terminated 
abnormally
cyrus/master[17882]: process 32406 exited, status 75
artemis cyrus/master[17882]: service imaps pid 32406 in BUSY state: 
terminated abnormally

Yikes! So it seems that I may have several different problems on my 
hands. But does anyone recognise anything here that would cause all or 
any of this to occur suddenly?