[Dovecot] Dovecot not honoring configuration settings (auth failure)

My dovecot.conf has the following:

# No results when searching the wiki
disable_plaintext_auth = no

# http://wiki2.dovecot.org/Authentication/Mechanisms
auth_mechanisms = plain login digest-md5 cram-md5

When I attempt to run imapsync, I receive an error:

Host2: <host> says it has NO CAPABILITY for AUTHENTICATE LOGIN

imapsync also dumps the helo string, and it is missing:

Host2: * OK [CAPABILITY IMAP4rev1 LITERAL+ ... STARTTLS

AUTH=PLAIN] Dovecot ready.

I've restarted the dovecot service with 'service dovecot restart' and even rebooted the machine.

There is nothing reported in any on the log files (/var/mail/dovecot.log and /var/log/mail.<level>).

Any ideas why dovecot is not honoring the setting in its config file?

# dovecot --version 2.1.7 # doveconf -n # 2.1.7: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-4-686-pae i686 Debian 7.4 disable_plaintext_auth = no log_path = /var/log/dovecot.log mail_location = mbox:~/mail:INBOX=/var/mail/%u namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } ... prefix = } passdb { args = /var/mail/%d/users driver = passwd-file } passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = " imap pop3" ssl_cert = </etc/dovecot/dovecot.pem ssl_key = </etc/dovecot/private/dovecot.pem userdb { driver = passwd }