I just updated my OS to the latest version of Centos 5.5 and now I can't send email. I am getting the error

an error occurred sending mail: the mail server sent an incorrect greeting: unable to read controls (#4.3.0)

Then I get

The message could not be sent because the connection to SMTP server mail.gbco.us was lost in the middle of the transaction.

Oddly enough, I can't really find any errors in the qmail logs. I thought it was a permissions error in /var/qmail/control but can't find anything there, here's a list of the permissions.

drwxr-xr-x 12 root     qmail 4096 Jul 19 11:33 ..
-rw-r--r--  1 vpopmail qmail   32 Jul 19 11:31 badloadertypes
-rw-r--r--  1 root     root  2048 Aug 10 09:25 badloadertypes.cdb
-rw-r--r--  1 vpopmail qmail   25 Jul 19 11:31 badmailfrom
-rw-r--r--  1 vpopmail qmail   29 Jul 19 11:31 badmailto
-rw-r--r--  1 vpopmail qmail  360 Jul 19 11:31 badmimetypes
-rw-r--r--  1 root     root  2048 Aug 10 09:25 badmimetypes.cdb
-rw-r--r--  1 vpopmail qmail   20 Jul 19 11:31 blacklists
drwxr-xr-x  2 vpopmail qmail 4096 Jul 19 11:18 certs
drwxr-xr-x  2 vpopmail qmail 4096 Sep 11  2009 certtemp
lrwxrwxrwx 1 root qmail 14 Jul 19 11:33 clientcert.pem -> servercert.pem
-rw-r--r--  1 vpopmail qmail    3 Apr 24  2008 concurrencyincoming
-rw-r--r--  1 vpopmail qmail    3 Oct  6  2005 concurrencylocal
-rw-r--r--  1 vpopmail qmail    3 Oct  6  2005 concurrencyremote
-rw-r--r--  1 vpopmail qmail    9 Jul 19 11:31 databytes
-rw-r--r--  1 vpopmail qmail   11 Jun  7  2007 defaultdelivery
-rw-r--r--  1 vpopmail qmail    8 Jun  7  2007 defaultdomain
-rw-r--r--  1 vpopmail qmail    1 Jul 17  2009 defaulthost
-rw-r--r--  1 vpopmail qmail  245 Aug 10 01:01 dh1024.pem
-rw-r--r--  1 vpopmail qmail  156 Aug 10 01:01 dh512.pem
drwxr-xr-x 21 root     qmail 4096 Jul 19 11:31 domainkeys
-rw-r--r--  1 vpopmail qmail  887 Sep 20  2006 key
-rw-r--r--  1 vpopmail qmail  963 Sep 20  2006 key.enc
-rw-r--r--  1 vpopmail qmail   13 Jul 26 06:34 locals
-rw-------  1 vpopmail qmail    0 Jan 19  2007 locals.lock
-rw-r--r--  1 vpopmail qmail    3 Jul 28  2009 logcount
-rw-r--r--  1 vpopmail qmail    8 Jul 19 11:31 logsize
-rw-r--r--  1 vpopmail qmail   13 Aug  3  2009 me
-rw-r--r--  1 vpopmail qmail    2 Apr 21  2006 mfcheck
drwxr-xr-x  2 vpopmail qmail 4096 Sep 19  2008 oldcert
-rw-r--r--  1 vpopmail qmail    8 Jun  7  2007 plusdomain
-rw-r--r--  1 vpopmail qmail    0 Jul 19 11:31 policy
-rw-r--r--  1 vpopmail qmail  187 Oct 18  2005 pop3ds.conf
-rw-r--r--  1 vpopmail qmail    7 Oct  6  2005 queuelifetime
-rw-r--r--  1 vpopmail qmail  646 Jul 26 06:34 rcpthosts
-rw-r--r--  1 vpopmail qmail  437 May  2  2006 rcpthosts.backup
-rw-------  1 vpopmail qmail    0 Jan 19  2007 rcpthosts.lock
-rw-r--r--  1 vpopmail qmail  497 Aug 10 01:01 rsa512.pem
-rw-r-----  1 vpopmail qmail  497 Sep 20  2006 rsa512.pem.old
-rw-r--r--  1 vpopmail qmail  908 Aug  1  2009 servercert.crt
-rw-r--r--  1 vpopmail qmail  680 Aug  1  2009 servercert.csr
-rw-r--r--  1 vpopmail qmail  891 Aug  1  2009 servercert.key
-rw-r--r--  1 vpopmail qmail  963 Aug  1  2009 servercert.key.enc
-rw-r--r--  1 vpopmail qmail 1799 Aug  1  2009 servercert.pem
-rw-r-----  1 vpopmail qmail 2359 Feb  2  2009 servercert.pem.old
-rw-r--r--  1 root     qmail 1689 Nov 29  2009 servercert.pem.rpmnew
-rw-r--r--  1 clamav   root    59 Sep 11  2009 simcontrol
-rw-r--r--  1 root     root  2129 Aug 10 09:25 simcontrol.cdb
-rw-r--r--  1 vpopmail qmail   82 Apr 25  2008 simcontrol-old
-rw-r--r--  1 vpopmail qmail  250 Jul 20  2009 simmcontrol.internap-server
-rw-r--r--  1 root     root  2165 Aug 10 09:25 simversions.cdb
-rw-r--r--  1 vpopmail qmail   14 Aug  2  2009 smtpgreeting
-rw-r--r--  1 vpopmail qmail    0 Jul 19 11:31 smtproutes
-rw-r--r--  1 vpopmail qmail    2 Jul 19 11:31 spfbehavior
-rw-r--r--  1 vpopmail qmail  247 Aug  3  2009 temp
lrwxrwxrwx 1 root root 35 Jul 19 11:33 tlsclientciphers -> /var/qmail/control/tlsserverciphers
-rw-r--r--  1 vpopmail qmail  600 Jul 19 11:33 tlsserverciphers
-rw-r--r--  1 vpopmail qmail 1148 Jul 26 06:34 virtualdomains
-rw-------  1 vpopmail qmail    0 Jan 19  2007 virtualdomains.lock

I thought it might be a spamdyke problem, so I disabled that, but no luck.

Then I disabled starttls in my client send and it's working now. However, I really don't want to send email unencrypted.

Any help would be greatly appreciated.

Thanks, Gary

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