I am unable to auth against the zimbra smtp server to send email.. here is the message I get:

Oct 17 13:44:04 nucular saslauthd[14226]: auth_zimbra: mike.adams auth failed: curl_easy_perform: error(7): couldn't connect to host
Oct 17 13:44:04 nucular saslauthd[14226]: do_auth : auth failure: [user=mike.adams] [service=smtp] [realm=unix-security.net] [mech=zimbra] [reason=Unknown]


saslauthd is running...

[root@nucular ~]# ps -ef | grep sasl
zimbra 14225 1 0 13:42 ? 00:00:00 /opt/zimbra/cyrus-sasl-2.1.21.ZIMBRA/sbin/saslauthd -a zimbra
zimbra 14226 14225 0 13:42 ? 00:00:00 /opt/zimbra/cyrus-sasl-2.1.21.ZIMBRA/sbin/saslauthd -a zimbra
zimbra 14228 14225 0 13:42 ? 00:00:00 /opt/zimbra/cyrus-sasl-2.1.21.ZIMBRA/sbin/saslauthd -a zimbra
zimbra 14229 14225 0 13:42 ? 00:00:00 /opt/zimbra/cyrus-sasl-2.1.21.ZIMBRA/sbin/saslauthd -a zimbra
zimbra 14230 14225 0 13:42 ? 00:00:00 /opt/zimbra/cyrus-sasl-2.1.21.ZIMBRA/sbin/saslauthd -a zimbra
root 16628 5850 0 13:45 pts/2 00:00:00 grep sasl
[root@nucular ~]#


Any clues? What is it trying to connect to?