I followed the howto here: Howto w/Centos 5.3 However, in my /var/log/messages file I'm seeing: Code: Sep 23 14:38:33 servername postfix/smtpd[16568]: sql_select option missing Sep 23 14:38:33 servername postfix/smtpd[16568]: auxpropfunc error no mechanism available Code: Sep 23 14:58:53 paulina saslauthd[17280]: main : no authentication mechanism specified Sep 23 14:59:05 paulina saslauthd[17283]: detach_tty : could not lock pid file /var/run/saslauthd/saslauthd.pid: Resource temporarily unavailable Sep 23 14:59:05 paulina saslauthd[17282]: detach_tty : Cannot start saslauthd Sep 23 14:59:05 paulina saslauthd[17282]: detach_tty : Another instance of saslauthd is currently running In /var/log/maillog I'm seeing: Code: Sep 23 15:07:25 paulina imapd: LOGIN FAILED, method=PLAIN, ip=[::ffff:76.105.20$ Sep 23 15:07:25 paulina imapd: authentication error: Input/output error I've following another howto specific to Debian and it worked perfectly.. but this one doesn't seem to be working so well. I've gone over the howto several times since last night and can't seem to find where I've gone wrong. When I telnet into pop3 (telnet localhost pop3) I can ehlo localhost and get the starttls respond, but when I try "user [email protected]" and "pass passwordhere" it just says: Code: -ERR Temporary problem, please try again later The previous mailserver went down yesterday and I'm scrambling to get this put together so I'm a little low on sleep at this point. Any help would be appreciated.